THINGS A BOY SHOULD KNOWABOUT ELECTRICITY.
By THOMAS M. ST. JOHN, Met. E.The book contains 180 pages, and 260 illustrations; it measures5 x 7½ in., and is bound in cloth.PRICE, POST-PAID, $1.00.
CONTENTS:ChapterI. About Frictional Electricity.—II. About Magnets and Magnetism.—III. How Electricity is Generated by the Voltaic Cell.—IV. Various Voltaic Cells.—V. About Push-Buttons, Switches and Binding-Posts.—VI. Units and Apparatus for Electrical Measurements.—VII. Chemical Effects of the Electric Current.—VIII. How Electroplating and Electrotyping are Done.—IX. The Storage Battery and How it Works.—X. How Electricity is Generated by Heat.—XI. Magnetic Effects of the Electric Current.—XII. How Electricity is Generated by Induction.—XIII. How the Induction Coil Works.—XIV. The Electric Telegraph, and How it Sends Messages.—XV. The Electric Bell and Some of its Uses.—XVI. The Telephone, and How it Transmits Speech.—XVII. How Electricity is Generated by Dynamos.—XVIII. How the Electric Current is Transformed.—XIX. How Electric Currents are Distributed for Use.—XX. How Heat is Produced by the Electric Current.—XXI. How Light is Produced by the Incandescent Lamp.—XXII. How Light is Produced by the Arc Lamp.—XXIII. X-Rays, and How the Bones of the Human Body are Photographed.—XXIV. The Electric Motor and How it Does Work.—XXV. Electric Cars, Boats and Automobiles.—XXVI. A Word About Central Stations.—XXVII. Miscellaneous Uses of Electricity.
CONTENTS:ChapterI. About Frictional Electricity.—II. About Magnets and Magnetism.—III. How Electricity is Generated by the Voltaic Cell.—IV. Various Voltaic Cells.—V. About Push-Buttons, Switches and Binding-Posts.—VI. Units and Apparatus for Electrical Measurements.—VII. Chemical Effects of the Electric Current.—VIII. How Electroplating and Electrotyping are Done.—IX. The Storage Battery and How it Works.—X. How Electricity is Generated by Heat.—XI. Magnetic Effects of the Electric Current.—XII. How Electricity is Generated by Induction.—XIII. How the Induction Coil Works.—XIV. The Electric Telegraph, and How it Sends Messages.—XV. The Electric Bell and Some of its Uses.—XVI. The Telephone, and How it Transmits Speech.—XVII. How Electricity is Generated by Dynamos.—XVIII. How the Electric Current is Transformed.—XIX. How Electric Currents are Distributed for Use.—XX. How Heat is Produced by the Electric Current.—XXI. How Light is Produced by the Incandescent Lamp.—XXII. How Light is Produced by the Arc Lamp.—XXIII. X-Rays, and How the Bones of the Human Body are Photographed.—XXIV. The Electric Motor and How it Does Work.—XXV. Electric Cars, Boats and Automobiles.—XXVI. A Word About Central Stations.—XXVII. Miscellaneous Uses of Electricity.
This book explains, in simple, straightforward language, many things about electricity; things in which the American boy is intensely interested; things he wants to know; things he should know.
It is free from technical language and rhetorical frills, but it tells how things work, and why they work.
It is brimful of illustrations—the best that can be had—illustrations that are taken directly from apparatus and machinery, and that show what they are intended to show.
This book does not contain experiments, or tell how to make apparatus; our other books do that. After explaining the simple principles of electricity, it shows how these principles are used and combined to make electricity do every-day work.
Everyone Should Know About Electricity.A VERY APPROPRIATE PRESENT
Third Edition
————————How Two Boys Made Their OwnElectrical Apparatus.
Containing complete directions for making all kinds of simple electrical apparatus for the study of elementary electricity. ByProfessor Thomas M. St. John, New York City.The book measures 5 × 7½ in., and is beautifully bound in cloth. It contains 141 pages and 125 illustrations. Complete directions are given for making 152 different pieces of Apparatus for the practical use of students, teachers, and others who wish to experiment.
Containing complete directions for making all kinds of simple electrical apparatus for the study of elementary electricity. ByProfessor Thomas M. St. John, New York City.
The book measures 5 × 7½ in., and is beautifully bound in cloth. It contains 141 pages and 125 illustrations. Complete directions are given for making 152 different pieces of Apparatus for the practical use of students, teachers, and others who wish to experiment.
PRICE, POST-PAID, $1.00.
The shocking coils, telegraph instruments, batteries, electromagnets, motors, etc., etc., are so simple in construction that any boy of average ability can make them; in fact, the illustrations have been made directly from apparatus constructed by young boys.
The author has been working along this line for several years, and he has been able,with the help of boys, to devise a complete line of simple electrical apparatus.
THE APPARATUS IS SIMPLE because the designs and methods of construction have been worked out practically in the school-room, absolutely no machine-work being required.THE APPARATUS IS PRACTICAL because it has been designed for real use in the experimental study of elementary electricity.THE APPARATUS IS CHEAP because most of the parts can be made of old tin cans and cracker boxes, bolts, screws, wires and wood.
THE APPARATUS IS SIMPLE because the designs and methods of construction have been worked out practically in the school-room, absolutely no machine-work being required.
THE APPARATUS IS PRACTICAL because it has been designed for real use in the experimental study of elementary electricity.
THE APPARATUS IS CHEAP because most of the parts can be made of old tin cans and cracker boxes, bolts, screws, wires and wood.
Address, THOMAS M. ST. JOHN,407 West 51st Street,New York.
How Two Boys Made Their OwnElectrical Apparatus.
CONTENTS:ChapterI. Cells and Batteries.—II. Battery Fluids and Solutions.—III. Miscellaneous Apparatus and Methods of Construction.—IV. Switches and Cut-Outs.—V. Binding-Posts and Connectors.—VI. Permanent Magnets,—VII. Magnetic Needles and Compasses.—VIII. Yokes and Armatures.—IX. Electro-Magnets.—X. Wire-Winding Apparatus.—XI. Induction Coils and Their Attachments.—XII. Contact Breakers and Current Interrupters.—XIII. Current Detectors and Galvanometers.—XIV. Telegraph Keys and Sounders.—XV. Electric Bells and Buzzers.—XVI. Commutators and Current Reversers.—XVII. Resistance Coils.—XVIII. Apparatus for Static Electricity.—XIX. Electric Motors.—XX. Odds and Ends.—XXI. Tools and Materials.
"The author of this book is a teacher and wirier of great ingenuity, and we imagine that the effect of such a book as this falling into juvenile hands must be highly stimulating and beneficial. It is full of explicit details and instructions in regard to a great variety of apparatus, and the materials required are all within the compass of very modest pocket-money. Moreover, it is systematic and entirely without rhetorical frills, so that the student can go right along without being diverted from good helpful work that will lead him to build useful apparatus and make him understand what he is about. The drawings are plain and excellent. We heartily commend the book."—Electrical Engineer.
"Those who visited the electrical exhibition last May cannot have failed to notice on the south gallery a very interesting exhibit, consisting, as it did, of electrical apparatus made by boys. The various devices there shown, comprising electro-magnets, telegraph keys and sounders, resistance coils, etc., were turned out by boys following the instructions given in the book with the above title, which is unquestionably one of the most practical little works yet written that treat of similar subjects, for with but a limited amount of mechanical knowledge, and by closely following the instructions given, almost any electrical device may be made at very small expense. That such a book fills a long-felt want may be inferred from the number of inquiries we are constantly receiving from persons desiring to make their own induction coils and other apparatus."—Electricity.
"At the electrical show in New York last May one of the most interesting exhibits was that of simple electrical apparatus made by the boys in one of the private schools in the city. This apparatus, made by boys of thirteen to fifteen years of age, was from designs by the author of this clever little book, and it was remarkable to see what an ingenious use had been made of old tin tomato-cans, cracker-boxes, bolts, screws, wire, and wood. With these simple materials telegraph instruments, coils, buzzers, current detectors, motors, switches, armatures, and an almost endless variety of apparatus were made, In this book Mr. St. John has given directions in simple language for making and using these devices, and has illustrated these directions with admirable diagrams and cuts. The little volume is unique, and will prove exceedingly helpful to those of our young readers who are fortunate enough to possess themselves of a copy. For schools where a course of elementary science is taught, no better text-book in the first-steps in electricity is obtainable."—The Great Round World.
Exhibit of Experimental Electrical Apparatus
AT THE ELECTRICAL SHOW, MADISON SQUARE GARDEN, NEW YORK.
While only 40 pieces of simple apparatus were shown in this exhibit, it gave visitors something of an idea of what young boys can do if given proper designs.
Photograph"HOW TWO BOYS MADE THEIR OWN ELECTRICAL APPARATUS"Gives Proper Designs—Designs for over 150 Things.
"HOW TWO BOYS MADE THEIR OWN ELECTRICAL APPARATUS"Gives Proper Designs—Designs for over 150 Things.
Fun With Photography
BOOK AND COMPLETE OUTFIT.
photograph
PHOTOGRAPHY is now an educational amusement, and to many it is the most fascinating of all amusements. The magic of sunshine, the wonders of nature, and the beauties of art are tools in the hand of the amateur photographer.
A great many things can be done with this outfit, and it will give an insight into this most popular pastime.
THE OUTFITcontains everything necessary for making ordinary prints—together with other articles to be used in various ways. The following things are included: One Illustrated Book of Instructions, called "Fun With Photography;" 1 Package of Sensitized Paper; 1 Printing Frame, including Glass, Back, and Spring; 1 Set of Masks for Printing Frame; 1 Set of Patterns for Fancy Shapes; 1 Book of Negatives (Patent Pending) Ready for Use; 6 Sheets of Blank Negative Paper; 1 Alphabet Sheet; 1 Package of Card Mounts; 1 Package of Folding Mounts; 1 Package of "Fixo."CONTENTS OF BOOK:—Chapter I. Introduction.—Photography.—Magic Sunshine.—The Outfit.—II. General Instructions.—The Sensitized Paper.—How the Effects are Produced.—Negatives.—Prints.—Printing Frames.—Our Printing Frame.—Putting Negatives in Printing Frame.—Printing.—Developing.—Fixing.—Drying.—Trimming.—Fancy Shapes.—Mounting.—III. Negatives and How to Make Them.—The Paper.—Making Transparent Paper.—Making the Negatives.—Printed Negatives.—Perforated Negatives.—Negatives Made from Magazine Pictures.—Ground Glass Negatives.—IV. Nature Photography.—Aids to Nature Study.—Ferns and Leaves.—Photographing Leaves.—Perforating Leaves.—Drying Leaves, Ferns, etc., for Negatives.—Flowers.—V. Miscellaneous Photographs.—Magnetic Photographs.—Combination Pictures.—Initial Pictures.—Name Plates.—Christmas, Easter and Birthday Cards.
THE OUTFITcontains everything necessary for making ordinary prints—together with other articles to be used in various ways. The following things are included: One Illustrated Book of Instructions, called "Fun With Photography;" 1 Package of Sensitized Paper; 1 Printing Frame, including Glass, Back, and Spring; 1 Set of Masks for Printing Frame; 1 Set of Patterns for Fancy Shapes; 1 Book of Negatives (Patent Pending) Ready for Use; 6 Sheets of Blank Negative Paper; 1 Alphabet Sheet; 1 Package of Card Mounts; 1 Package of Folding Mounts; 1 Package of "Fixo."
CONTENTS OF BOOK:—Chapter I. Introduction.—Photography.—Magic Sunshine.—The Outfit.—II. General Instructions.—The Sensitized Paper.—How the Effects are Produced.—Negatives.—Prints.—Printing Frames.—Our Printing Frame.—Putting Negatives in Printing Frame.—Printing.—Developing.—Fixing.—Drying.—Trimming.—Fancy Shapes.—Mounting.—III. Negatives and How to Make Them.—The Paper.—Making Transparent Paper.—Making the Negatives.—Printed Negatives.—Perforated Negatives.—Negatives Made from Magazine Pictures.—Ground Glass Negatives.—IV. Nature Photography.—Aids to Nature Study.—Ferns and Leaves.—Photographing Leaves.—Perforating Leaves.—Drying Leaves, Ferns, etc., for Negatives.—Flowers.—V. Miscellaneous Photographs.—Magnetic Photographs.—Combination Pictures.—Initial Pictures.—Name Plates.—Christmas, Easter and Birthday Cards.
The Book and Complete Outfit will be sent, by mail orexpress, Charges Prepaid, upon receipt of 65 Cents, byTHOMAS M. ST. JOHN, 407 W. 51st St., New York.
Fun With Magnetism.
BOOK AND COMPLETE OUTFIT FOR SIXTY-ONEEXPERIMENTS IN MAGNETISM. . .
Children like to do experiments; and in this way, better than in any other,a practical knowledge of the elements of magnetismmay be obtained.
These experiments, although arranged toamuseboys and girls, have been found to be veryuseful in the class-roomto supplement the ordinary exercises given in text-books of science.
To secure thebest possible quality of apparatus, the horseshoe magnets were made at Sheffield, England, especially for these sets. They are new and strong. Other parts of the apparatus have also been selected and made with great care, to adapt them particularly to these experiments.—From the author's preface.
CONTENTS.—Experiments With Horseshoe Magnet.—Experiments With Magnetized Needles.—Experiments With Needles, Corks, Wires, Nails, etc.—Experiments With Bar Magnets.—Experiments With Floating Magnets.—Miscellaneous Experiments.—Miscellaneous Illustrations showing what very small children can do with the Apparatus.—Diagrams showing how Magnetized Needles may be used by little children to make hundreds of pretty designs upon paper.AMUSING EXPERIMENTS.—Something for Nervous People to Try.—The Jersey Mosquito.—The Stampede.—The Runaway.—The Dog-fight.—The Whirligig.—The Naval Battle.—A String of Fish.—A Magnetic Gun.—A Top Upsidedown.—A Magnetic Windmill.—A Compass Upsidedown.—The Magnetic Acrobat.—The Busy Ant-hill.—The Magnetic Bridge.—The Merry-go-Round.—The Tight-rope Walker.—A Magnetic Motor Using Attractions and Repulsions.
CONTENTS.—Experiments With Horseshoe Magnet.—Experiments With Magnetized Needles.—Experiments With Needles, Corks, Wires, Nails, etc.—Experiments With Bar Magnets.—Experiments With Floating Magnets.—Miscellaneous Experiments.—Miscellaneous Illustrations showing what very small children can do with the Apparatus.—Diagrams showing how Magnetized Needles may be used by little children to make hundreds of pretty designs upon paper.
AMUSING EXPERIMENTS.—Something for Nervous People to Try.—The Jersey Mosquito.—The Stampede.—The Runaway.—The Dog-fight.—The Whirligig.—The Naval Battle.—A String of Fish.—A Magnetic Gun.—A Top Upsidedown.—A Magnetic Windmill.—A Compass Upsidedown.—The Magnetic Acrobat.—The Busy Ant-hill.—The Magnetic Bridge.—The Merry-go-Round.—The Tight-rope Walker.—A Magnetic Motor Using Attractions and Repulsions.
The Book and Complete Outfit will be sent, Post-paid,upon receipt of 35 Cents, byTHOMAS M. ST. JOHN, 407 W. 51st St., New York.
FUN WITH SHADOWS
BOOK AND COMPLETE OUTFIT FOR SHADOW PICTURES,PANTOMIMES, ENTERTAINMENTS, Etc., Etc.
keystone cops outline
Shadow Makinghas been a very popular amusement for several centuries. There is a great deal offunand instruction in it, and its long life is due to the fact that it has always been a source of keen delight to grown people as well as to children.
In getting material together for this little book, the author has been greatly aided by English, French and American authors, some of whom are professional shadowists. It has been the author's special effort to get the subject and apparatus into a practical, cheap form for boys and girls.
THE OUTFITcontains everything necessary for all ordinary shadow pictures, shadow entertainments, shadow plays, etc. The following articles are included:One book of Instructions called "Fun with Shadows"; 1 Shadow Screen; 2 Sheets of Tracing Paper; 1 Coil of Wire for Movable Figures; 1 Cardboard Frame for Circular Screen; 1 Cardboard House for Stage Scenery; 1 Jointed Wire Fish-pole and Line; 2 Bent Wire Scenery Holders; 4 Clamps for Screen; 1 Wire Figure Support; 1 Wire for Oar; 2 Spring Wire Table Clamps; 1 Wire Candlestick Holder; 5 Cardboard Plates containing the following printed figures that should be cut out with shears: 12 Character Hats; 1 Boat; 1 Oar-blade; 1 Fish; 1 Candlestick; 1 Cardboard Plate containing printed parts for making movable figures.CONTENTS OF BOOK:One Hundred Illustrations and Diagrams, including Ten Full-page Book Plates, together with Six Full-page Plates on Cardboard.ChapterI. Introduction.—II. General Instructions.—III. Hand Shadows of Animals.—IV. Hand Shadows of Heads, Character Faces, etc.—V. Moving Shadow Figures and How to Make Them.—VI. Shadow Pantomimes.—VII. Miscellaneous Shadows.
THE OUTFITcontains everything necessary for all ordinary shadow pictures, shadow entertainments, shadow plays, etc. The following articles are included:
One book of Instructions called "Fun with Shadows"; 1 Shadow Screen; 2 Sheets of Tracing Paper; 1 Coil of Wire for Movable Figures; 1 Cardboard Frame for Circular Screen; 1 Cardboard House for Stage Scenery; 1 Jointed Wire Fish-pole and Line; 2 Bent Wire Scenery Holders; 4 Clamps for Screen; 1 Wire Figure Support; 1 Wire for Oar; 2 Spring Wire Table Clamps; 1 Wire Candlestick Holder; 5 Cardboard Plates containing the following printed figures that should be cut out with shears: 12 Character Hats; 1 Boat; 1 Oar-blade; 1 Fish; 1 Candlestick; 1 Cardboard Plate containing printed parts for making movable figures.
CONTENTS OF BOOK:One Hundred Illustrations and Diagrams, including Ten Full-page Book Plates, together with Six Full-page Plates on Cardboard.
ChapterI. Introduction.—II. General Instructions.—III. Hand Shadows of Animals.—IV. Hand Shadows of Heads, Character Faces, etc.—V. Moving Shadow Figures and How to Make Them.—VI. Shadow Pantomimes.—VII. Miscellaneous Shadows.
The Book and Complete Outfit will be sent,POST-PAID,upon receipt of 35 cents, byTHOMAS M. ST. JOHN, 407 West 51st St., New York City.
Fun With Electricity.
BOOK AND COMPLETE OUTFIT FOR SIXTYEXPERIMENTS IN ELECTRICITY. . . .
Enough of the principles of electricity are brought out to make the book instructive as well as amusing. The experiments are systematically arranged, and make a fascinating science course. No chemicals, no danger.
The book is conversational and not at all "schooly," Harry and Ned being two boys who perform the experiments and talk over the results as they go along.
"The book reads like a story."—"An appropriate present for a boy or girl."—"Intelligent parents will appreciate 'Fun With Electricity.'"—"Very complete, because it contains both book and apparatus."—"There is no end to the fun which a boy or girl can have with this fascinating amusement."
THERE IS FUN IN THESE EXPERIMENTS.—Chain Lightning.—An Electric Whirligig.—The Baby Thunderstorm.—A Race with Electricity.—An Electric Frog Pond.—An Electric Ding-Dong.—The Magic Finger.—Daddy Long-Legs.—Jumping Sally.—An Electric Kite.—Very Shocking.—Condensed Lightning.—An Electric Fly-Trap.—The Merry Pendulum.—An Electric Ferry-Boat.—A Funny Piece of Paper.—A Joke on the Family Cat.—Electricity Plays Leap-Frog.—Lightning Goes Over a Bridge.—Electricity Carries a Lantern.—And40 Others.TheOUTFITcontains 20 different articles. TheBOOK OF INSTRUCTIONmeasures 5 x 7½ inches, and has 38 illustrations, 55 pages, good paper and clear type.
THERE IS FUN IN THESE EXPERIMENTS.—Chain Lightning.—An Electric Whirligig.—The Baby Thunderstorm.—A Race with Electricity.—An Electric Frog Pond.—An Electric Ding-Dong.—The Magic Finger.—Daddy Long-Legs.—Jumping Sally.—An Electric Kite.—Very Shocking.—Condensed Lightning.—An Electric Fly-Trap.—The Merry Pendulum.—An Electric Ferry-Boat.—A Funny Piece of Paper.—A Joke on the Family Cat.—Electricity Plays Leap-Frog.—Lightning Goes Over a Bridge.—Electricity Carries a Lantern.—And40 Others.
TheOUTFITcontains 20 different articles. TheBOOK OF INSTRUCTIONmeasures 5 x 7½ inches, and has 38 illustrations, 55 pages, good paper and clear type.
The Book, and Complete Outfit will be sent, by mail orexpress, Charges Prepaid, upon receipt of 65 Cents, byTHOMAS M. ST. JOHN, 407 W. 51st St., New York.
Fun With Puzzles.
BOOK, KEY, AND COMPLETE OUTFIT FORFOUR HUNDRED PUZZLES. . .
The BOOK measures 5 × 7½ inches. It is well printed, nicely bound, and contains 15 chapters, 80 pages, and 128 illustrations. The KEY is illustrated. It is bound with the book, and contains the solution of every puzzle. The COMPLETE OUTFIT is placed in a neat box with the book. It consists of numbers, counters, figures, pictures, etc., for doing the puzzles.
CONTENTS:Chapter(1) Secret Writing. (2) Magic Triangles, Squares, Rectangles, Hexagons, Crosses, Circles, etc. (3) Dropped Letter and Dropped Word Puzzles. (4) Mixed Proverbs, Prose and Rhyme. (5) Word Diamonds, Squares, Triangles, and Rhomboids. (6) Numerical Enigmas. (7) Jumbled Writing and Magic Proverbs. (8) Dissected Puzzles. (9) Hidden and Concealed Words. (10) Divided Cakes, Pies, Gardens, Farms, etc. (11) Bicycle and Boat Puzzles. (12) Various Word and Letter Puzzles. (13) Puzzles with Counters. (14) Combination Puzzles. (15) Mazes and Labyrinths.
CONTENTS:Chapter(1) Secret Writing. (2) Magic Triangles, Squares, Rectangles, Hexagons, Crosses, Circles, etc. (3) Dropped Letter and Dropped Word Puzzles. (4) Mixed Proverbs, Prose and Rhyme. (5) Word Diamonds, Squares, Triangles, and Rhomboids. (6) Numerical Enigmas. (7) Jumbled Writing and Magic Proverbs. (8) Dissected Puzzles. (9) Hidden and Concealed Words. (10) Divided Cakes, Pies, Gardens, Farms, etc. (11) Bicycle and Boat Puzzles. (12) Various Word and Letter Puzzles. (13) Puzzles with Counters. (14) Combination Puzzles. (15) Mazes and Labyrinths.
"Fun With Puzzles" is a book that every boy and girl should have. It is amusing, instructive,—educational. It is just the thing to wake up boys and girls and make them think. They like it, because it is real fun. This sort of educational play should be given in every school-room and in every home.
"Fun With Puzzles" will puzzle your friends, as well as yourself; it contains some real brain-splitters. Over 300 new and original puzzles are given, besides many that are hundreds of years old.
Secret Writing.Among the many things that "F. W. P." contains, is the key tosecret writing. It shows you a very simple way to write letters to your friends, and it is simply impossible for others to read what you have written, unless they know the secret. This, alone is a valuable thing for any boy or girl who wants to have some fun.
The Book, Key, and Complete Outfit will be sent, postpaid,upon receipt of 35 cents, byTHOMAS M. ST. JOHN, 407 West 51st St., New York City.
Fun With Soap-Bubbles.
BOOK AND COMPLETE OUTFIT FOR FANCYBUBBLES AND FILMS. . . .
THE OUTFITcontains everything necessary for thousands of beautiful bubbles and films. All highly colored articles have been carefully avoided, as cheap paints and dyes are positively dangerous in children's mouths. The outfit contains the following articles:
One Book of Instructions, called "Fun With Soap-Bubbles," 1 Metal Base for Bubble Stand, 1 Wooden Rod for Bubble Stand, 3 Large Wire Rings for Bubble Stand, 1 Small Wire Ring, 3 Straws, 1 Package of Prepared Soap, 1 Bubble Pipe, 1 Water-proof Bubble Horn. The complete outfit is placed in a neat box with the book. (Extra Horns, Soap, etc., furnished at slight cost.)
CONTENTS OF BOOK.—Twenty-one Illustrations.—Introduction.—The Colors of Soap-bubbles.—The Outfit.—Soap Mixture.—Useful Hints.—Bubbles Blown With Pipes.—Bubbles Blown With Straws.—Bubbles Blown With the Horn.—Floating Bubbles.—Baby Bubbles.—Smoke Bubbles.—Bombshell Bubbles.—Dancing Bubbles.—Bubble Games.—Supported Bubbles.—Bubble Cluster.—Suspended Bubbles.—Bubble Lamp Chimney.—Bubble Lenses.—Bubble Basket.—Bubble Bellows.—To Draw a Bubble Through a Ring.—Bubble Acorn.—Bubble Bottle.—A Bubble Within a Bubble.—Another Way.—Bubble Shade.—Bubble Hammock.—Wrestling Bubbles.—A Smoking Bubble.—Soap Films.—The Tennis Racket Film.—Fish-net Film.—Pan-shaped Film.—Bow and Arrow Film.—Bubble Dome.—Double Bubble Dome.—Pyramid Bubbles.—Turtle-back Bubbles.—Soap-bubbles and Frictional Electricity.
CONTENTS OF BOOK.—Twenty-one Illustrations.—Introduction.—The Colors of Soap-bubbles.—The Outfit.—Soap Mixture.—Useful Hints.—Bubbles Blown With Pipes.—Bubbles Blown With Straws.—Bubbles Blown With the Horn.—Floating Bubbles.—Baby Bubbles.—Smoke Bubbles.—Bombshell Bubbles.—Dancing Bubbles.—Bubble Games.—Supported Bubbles.—Bubble Cluster.—Suspended Bubbles.—Bubble Lamp Chimney.—Bubble Lenses.—Bubble Basket.—Bubble Bellows.—To Draw a Bubble Through a Ring.—Bubble Acorn.—Bubble Bottle.—A Bubble Within a Bubble.—Another Way.—Bubble Shade.—Bubble Hammock.—Wrestling Bubbles.—A Smoking Bubble.—Soap Films.—The Tennis Racket Film.—Fish-net Film.—Pan-shaped Film.—Bow and Arrow Film.—Bubble Dome.—Double Bubble Dome.—Pyramid Bubbles.—Turtle-back Bubbles.—Soap-bubbles and Frictional Electricity.
————————
"There is nothing more beautiful than the airy-fairy soap-bubble with its everchanging colors."
————————THE BEST POSSIBLE AMUSEMENT FOR OLDAND YOUNG.————————The Book and Complete Outfit will be sent,POST-PAID,upon receipt of 35 cents, byTHOMAS M. ST. JOHN, 407 West 51st St., New York City.
The Study of Elementary Electricity andMagnetism by Experiment.
By THOMAS M. ST. JOHN, Met. E.The book contains 220 pages and 168 illustrations;it measures 5 × 7½ in. and is bound in green cloth.PRICE, POST-PAID, $1.25.
This book is designed as a text-book for amateurs, students, and others who wish to take up a systematic course of elementary electrical experiments at home or in school. Full directions are given for . . . . . . .
Two Hundred Simple Experiments.
The experiments are discussed by the author, after the student has been led to form his own opinion about the results obtained and the points learned.
In selecting the apparatus for the experiments in this book, the author has kept constantly in mind the fact that the average student will not buy the expensive pieces usually described in text-books.
The two hundred experiments given can be performed with simple apparatus; in fact, the student should make at least a part of his own apparatus, and for the benefit of those who wish to do this, the author has given, throughout the work, explanations that will aid in the construction of certain pieces especially adapted to these experiments. For those who have the author's "How Two Boys Made Their Own Electrical Apparatus," constant references have been made to it as the "Apparatus Book," as this contains full details for making almost all kinds of simple apparatus needed in "The Study of Elementary Electricity and Magnetism by Experiment."
The two hundred experiments given can be performed with simple apparatus; in fact, the student should make at least a part of his own apparatus, and for the benefit of those who wish to do this, the author has given, throughout the work, explanations that will aid in the construction of certain pieces especially adapted to these experiments. For those who have the author's "How Two Boys Made Their Own Electrical Apparatus," constant references have been made to it as the "Apparatus Book," as this contains full details for making almost all kinds of simple apparatus needed in "The Study of Elementary Electricity and Magnetism by Experiment."
If you wish to take up a systematic course of experiments—experiments that may be performed with simple, inexpensive apparatus,—this book will serve as a valuable guide.
Condensed List of Apparatus
FOR
"The Study of Elementary Electricityand Magnetism by Experiment."
————————
Number1. Steel Needles; package of twenty-five.—2. Flat Cork.—3. Candle.—4-15. Annealed Iron Wires; assorted lengths.—16. Horseshoe Magnet; best quality; English.—17. Iron Filings.—18. Parts for Compass.—19, 20. Wire Nails; soft steel.—21, 22. Spring Steel; for bar magnets.—23. Iron Ring.—24. Sifter; for iron filings.—25. Spring Steel; for flexible magnet.—26, 27. Ebonite Sheets; with special surface.—28. Ebonite Rod.—29. Ebonite Rod; short.—30. Flannel Cloth.—31. Tissue Paper.—32. Cotton Thread.—33. Silk Thread.—34. Support Base.—35. Support Rod.—36. Support Wire.—37. Wire Swing.—38. Sheet of Glass.—39. Hairpin.—40. Circular Conductor.—41. Circular Conductor.—42. Electrophorus Cover.—43. Insulating Table.—44. Insulated Copper Wire.—45. Rubber Band.—46. Bent Wire Clamps.—47. Cylindrical Conductor.—48. Discharger; for condenser.—49. Aluminum-Leaf.—50. Wires.
51. Dry Cell.—52. Mercury.—53. Insulated Copper Wire; for connections.—54. Spring Connectors; two dozen.—55. Parts for Key.—56. Metal Connecting Plates.—57. Parts for Current Reverser.—58. Parts for Galvanoscope.—59. Parts for Astatic Galvanoscope.—60-63. Zinc Strips.—64. Carbon Rod.—65, 66. Glass Tumblers.—67, 68. Copper Strips.—69. Galvanized Iron Nail.—70, 71. Wooden Cross-Pieces.—72. Brass Screws; one dozen.—73. Porous Cup.—74. Zinc Rod.—75. Copper Plate.—76. Iron Strip.—77, 78. Lead Strips.—79. Parts for Resistance Coil.—80. Parts for Wheatstone's Bridge.—81. German-Silver Wire; Size No. 30.—82. German-Silver Wire; No. 28.—83—85. Plate Binding-Posts.—86. Copper Sulphate.—87. Copper Burs; one dozen.—88. Combination Rule.—89. Coil of Wire; on spool for electromagnet.—90. Coil of Wire; on spool for electromagnet.—91. Carbon Rod.—92, 93. Soft Iron Cores with Screws.—94. Combined Base and Yoke.—95. Combination Connecting Plates.—96. Long Iron Core.—97. Round Bar Magnet, 5 × 3/8 in.—98. Thin Electromagnet.—99. Degree-Card; for galvanoscope.—100. Scale for Bridge.—101, 102. Soft Iron Cores with Heads.—103, 104. Flat Bar Magnets; these are 6 × ½ × ¼ in.; highly polished steel; poles marked.—105. Compass.
Illustrated Price Catalogue upon Application.
Electrical Apparatus For SaleA COMPLETE ELECTRIC AND MAGNETICCABINET FOR STUDENTS, SCHOOLS ANDAMATEURS. SIX EXTRAORDINARY OFFERS
This Cabinet of Electrical Experimentscontains three main parts: (A) Apparatus; (B) Text-Book; (C) Apparatus List.
(A)The Apparatusfurnished consists of one hundred and five pieces. Over three hundred separate articles are used in making up this set. Most of it is ready for use when received. Seven pieces, however, are not assembled; but the parts can be readily finished and put together. (Sold, also,allpieces assembled.)
(B)The Text-Book—called "The Study of Elementary Electricity and Magnetism by Experiment"—gives full directions for two hundred experiments. (See table of contents, etc.) Price, post-paid, $1.25.
(C)The Apparatus Listis an illustrated book devoted entirely to this special set of apparatus. Not given with first offer.
THE APPARATUS IS SIMPLE because the designs and methods of construction have been worked out with great care.THE APPARATUS IS PRACTICAL because it has been designed for real use in "The Study of Elementary Electricity and Magnetism by Experiment."THE APPARATUS IS CHEAP because the various parts are so designed that they can be turned out in quantity by machinery.
THE APPARATUS IS SIMPLE because the designs and methods of construction have been worked out with great care.
THE APPARATUS IS PRACTICAL because it has been designed for real use in "The Study of Elementary Electricity and Magnetism by Experiment."
THE APPARATUS IS CHEAP because the various parts are so designed that they can be turned out in quantity by machinery.
1st Offer:Pieces 1 to 50$1.002d Offer:Pieces 51 to 105, with part (C)3.503d Offer:Pieces 1 to 105, with part (C)4.004th Offer:Complete Cabinet, parts (A), (B), (C)5.005th Offer:Apparatus only, all pieces assembled4.606th Offer:Complete Cabinet, all pieces assembled5.60
————————Express charges must be paid by you. Estimates given.————————
A "Special Catalogue," pertaining to the above, with complete price-list, will be mailed upon application.
THOMAS M. ST. JOHN, 407 West 51st St., New York City
Fun With Telegraphy
BOOK AND COMPLETE OUTFIT.
drawing boy working on telegraph with wire to house next door
TELEGRAPHYis of the greatest importance to all civilized nations, and upon it depend some of the world's most important enterprises. Every boy and girl can make practical use of telegraphy in one way or another, and the time it takes to learn it will be well spent.
THE OUTFIT.—Mr. St. John has worked for a number of years to produce a telegraph outfit that would be simple, cheap, and practical for those who wish to make a study of telegraphy. After making and experimenting with nearly one hundred models, many of which were good, he has at last perfected an instrument so simple, original, and effective that it is now being made in large quantities.
The sounders are so designed that they will work properly with any dry cell of ordinary strength, and this is a great advantage for practice lines. Dry batteries are cheap and clean, and there are no dangers from acids.
The outfit consists of the following articles, placed in a neat box: One Book of Instruction, called "Fun With Telegraphy"; one Telegraph "Key"; one Telegraph "Sounder"; Insulated Copper Wires for connections. The "key" and "sounder" are mounted, with proper "binding-posts," upon a base of peculiar construction, which aids in giving a large volume of sound.
CONTENTS OF BOOK.—Telegraphy.—The Outfit.—A Complete Telegraph Line.—Connections.—The Telegraph Key.—The Sounder.—The Battery.—A Practice Line.—A Two-instrument Line.—Operation of Line.—The Morse Telegraph Alphabet.—Aids to Learning Alphabet.—Cautions.—Office Calls.—Receiving Messages.—Remember.—Extra Parts.
ABOUT BATTERIES.—For those who cannot easily secure batteries, we will furnish small dry cells, post-paid, at 15 cents each, in order to deliver the outfits complete to our customers. This price barely covers the total cost to us, postage alone being 6 cents.
FUN WITH TELEGRAPHY, including Book, Key, Sounder,and Wire (no battery), post-paid, 50 cents, byTHOMAS M. ST. JOHN, 848 Ninth Ave., New York
Tool Sets for Students
The following tool sets have been arranged especially for those who wish to make use of the designs contained in "How Two Boys Made Their Own Electrical Apparatus," "Real Electric Toy-Making for Boys," "Electric Instrument-Making," etc. It is very poor economy to waste valuable time and energy in order to save the cost of a few extra tools.
NOTE.—Save money by buying your tools in sets. We do not pay express or freight charges at the special prices below.
FOR $1.00.—OneSteel Punch; round, knurled head.—One lightHammer; polished, nickel-plated, varnished handle.—OneIron Clamp; japanned, 2¼ in.—OneScrew-Driver; tempered and polished blade, cherry stained hardwood handle, nickel ferrule.—OneWrench; retinned skeleton frame, gilt adjusting wheel.—OneAwl; tempered steel point, turned and stained wood handle, with ferrule.—OneVise; full malleable, nicely retinned, 1-3/8 in. jaws, full malleable screw with spring.—One pairSteel Pliers; 4 in. long, polished tool steel, unbreakable, best grooved jaw.—One pair ofShears; carbonized steel blades, hardened edge, nickel-plated, heavy brass nut and bolt.—OneFile; triangular, good steel.—OneFile Handle; good wood, brass ferrule.—OneFoot Rule; varnished wood, has English and metric system.—OneSoldering Set; contains soldering iron, solder, resin, sal ammoniac, and directions. OneCenter-Punch; finely tempered steel.
FOR $2.00.—All that is contained in the $1.00 set of tools, together with the following: One pair ofTinner's Shears; cut, 2¾ in., cast iron, hardened, suitable for cutting thin metal.—OneHollow Handle Tool Set; very useful; polished handle holds 10 tools, gimlet, brad-awls, chisel, etc.—OneTry Square; 6-in. blue steel blade, marked in 1/8s, strongly riveted.—One 1-lb.Hammer; full size, polished head, wedged varnished hardwood handle.—OneHack Saw; steel frame, 9½-in. polished steel blade, black enamel handle; very useful.
FOR $3.50.—TwoSteel Punches; different sizes, one solid round, knurled head, polished; the other, point and head brightly polished, full nickel, center part knurled.—OneLight Hammer; polished and nickel plated, varnished handle.—One regularMachinist's Hammer; ball peen, solid cast steel, with varnished hardwood handle; a superior article.—TwoIron Clamps; one opens 2¼ in., the other 3 in., japanned.—OneScrew-Driver; tempered and polished blade, firmly set in cherry stained hardwood handle with nickel ferrule.—OneWrench; retinned, skeleton frame, gilt adjusting wheel.—OneAwl; tempered steel blade, ground to point, firmly set in turned and stained handle with ferrule.—OneSteel Vise; 2¼-in., jaws, steel screw, bright polished jaws and handle; a good strong vise.—One pair ofSteel Pliers; 6 in. long, bright steel, flat nose, 2 wire-cutters, practically unbreakable.—One pair ofShears; carbonized steel blades, hardened edges, nickel plated, heavy brass nut and bolt.—OneFile; triangular and of good steel.—OneFile Handle; good wood, with brass ferrule.—OneFoot Rule; varnished wood, has both the English and metric systems.—OneSoldering Set; contains soldering iron, solder, resin, sal ammoniac, and directions; a very handy article.—OneCenter-Punch; finely tempered steel.—One pair ofTinner's Shears; these are best grade, inlaid steel cutting edges, polished and tempered, japanned handles; thoroughly reliable.—OneHollow Handle Tool Set; very useful; the polished handle holds 10 tools, gimlet, chisel, brad-awl, etc.—OneTry Square; 6-in. blue steel blade, marked both sides in 1/8s, strongly riveted with brass rivets.—OneHack Saw; steel frame, 9½-in. polished steel blade, black enamel handle; very useful for sawing small pieces of wood.
FOR $5.00will be included everything in the $3.50 offer, and the following: OneGlue-Pot; medium size, with brush and best wood glue; inside pot has hinge cover.—OneRatchet Screw-Driver; great improvement over ordinary screw-drivers; well made and useful.—OneHand Drill; frame malleable iron; hollow screw top holding 6 drills; bores from 1-16 to 3-16-in. holes; solid gear teeth; 3-jawed nickel plated chuck; a superior tool, and almost a necessity.
GIVE THE BOY A SET OF TOOLS————————THOMAS M. ST. JOHN, 848 Ninth Ave., New York
REAL ELECTRIC TOY-MAKINGFOR BOYS
ByTHOMAS M. ST. JOHN, Met. E.This book contains 140 pages and over one hundredoriginal drawings, diagrams, and full-page plates.It measures 5 x 7½ in., and is bound in cloth.Price, post-paid, $1.00
CONTENTS:ChapterI. Toys Operated by Permanent Magnets.—II. Toys Operated by Static Electricity.—III. Making Electromagnets for Toys.—IV. Electric Batteries.—V. Circuits and Connections.—VI. Toys Operated by Electromagnets. VII. Making Solenoids for Toys.—VIII. Toys Operated by Solenoids.—IX. Electric Motors.—X. Power, Speed, and Gearing.—XI. Shafting and Bearings.—XII. Pulleys and Winding-Drums.—XIII. Belts and Cables.—XIV. Toys Operated by Electric Motors.—XV. Miscellaneous Electric Toys.—XVI. Tools.—XVII. Materials.—XVIII. Various Aids to Construction.
While planning this book, Mr. St. John definitely decided that he would not fill it with descriptions of complicated, machine-made instruments and apparatus, under the name of "Toy-Making," for it is just as impossible for most boys to get the parts for such things as it is for them to do the required machine work even after they have the raw materials.
Great care has been taken in designing the toys which are described in this book, in order to make them so simple that any boy of average ability can construct them out of ordinary materials. The author can personally guarantee the designs, for there is no guesswork about them. Every toy was made, changed, and experimented with until it was as simple as possible; the drawings were then made from the perfected models.
As the result of the enormous amount of work and experimenting which were required to originate and perfect so many new models, the author feels that this book may be truly called "Real Electric Toy-Making for Boys."
Every Boy Should Make Electrical Toys.
The Electric Shooting Game
A MOST ORIGINAL AND FASCINATING GAMEPATENT APPLIED FOR AND COPYRIGHTED
Bison
SHOOTING BY ELECTRICITY————————
The Electric Shooting Gameis an entirely new idea, and one that brings into use that most mysterious something—electricity. The game is so simple that small children can play it, and as there are no batteries, acids, or liquids of any kind, there is absolutely no danger. The electricity is of such a nature that it is perfectly harmless—but very active.
The "game-preserve" is neat and attractive, being printed in colors, and the birds and animals are well worth hunting. Each has a fixed value—and some of them must not be shot at all—so there is ample opportunity for a display of skill in bringing down those which count most.
"Electric bullets" are actually shot from the "electric gun" by electricity. This instructive game will furnish a vast amount of amusement to all.
The "Game-Preserve,"—the "Electric Gun,"—the "Shooting-Box,"—the "Electric Bullets,"—in fact, the entire electrical outfit, together with complete illustrated directions, will be sent in a neat box, Post-Paid, upon receipt of 50 cents, by
THOMAS M. ST. JOHN, 848 Ninth Ave., New York
Transcriber's Note:Obvious punctuation errors were corrected.Page 46, "turnnd" changed to "turned" (be turned to 1)Page 66, word "a" added to text (in a glass jar)
Transcriber's Note:
Obvious punctuation errors were corrected.
Page 46, "turnnd" changed to "turned" (be turned to 1)
Page 66, word "a" added to text (in a glass jar)