THEElements of Natural Philosophy

What must each station have?

Each station must have both a key and a receiver, so as to send as well as receive messages.

What is the Atlantic cable?

The Atlantic cable is a telegraphic wire reaching across the Atlantic Ocean, from America to Europe.

When was the first Atlantic cable laid?

The first Atlantic cable was successfully laid in 1866, between Newfoundland and Ireland. It is eighteen hundred and sixty-four miles long, and its success is chiefly due to Cyrus W. Field.

Of what use is the Atlantic cable?

The Atlantic cable forms a telegraphic connection between Europe and America, so that news may be sent from one country to the other in a few moments of time; thus the people of the two continents, although so far apart, can communicate with each other many times in a single day.

Fruit bowl.

THEElements of Natural PhilosophyBy E. J. HOUSTON, A.M.,Professor of Physics and Physical Geography in the Central High School, Philadelphia, Pa.This book is intended for Graded Schools, Academies, Seminaries, Normal Schools, etc. It gives the elements of the science in a concise form and in logical sequence, so that the book forms asystemof Natural Philosophy, and not a mere collection of disconnected facts. It is fully “up to the times” in every respect, and gives full descriptions of the more important discoveries lately made in Physical Science; the Electric Light, the Telephone, the Microphone, the Phonograph, etc., are all described and illustrated. An examination of the work will show that no expense has been spared to bring it up to the highest standard as regards illustration and typography.We invite the attention of Teachers to our Publications, a Catalogue of which will be sent on application. On our List will be found some of the most popular of modern Text-Books.Please addressEldredge & Bro.,17 North Seventh Street,PHILADELPHIA.

By E. J. HOUSTON, A.M.,Professor of Physics and Physical Geography in the Central High School, Philadelphia, Pa.

This book is intended for Graded Schools, Academies, Seminaries, Normal Schools, etc. It gives the elements of the science in a concise form and in logical sequence, so that the book forms asystemof Natural Philosophy, and not a mere collection of disconnected facts. It is fully “up to the times” in every respect, and gives full descriptions of the more important discoveries lately made in Physical Science; the Electric Light, the Telephone, the Microphone, the Phonograph, etc., are all described and illustrated. An examination of the work will show that no expense has been spared to bring it up to the highest standard as regards illustration and typography.

We invite the attention of Teachers to our Publications, a Catalogue of which will be sent on application. On our List will be found some of the most popular of modern Text-Books.

Please address

Eldredge & Bro.,17 North Seventh Street,PHILADELPHIA.

MORGAN & HANFORD.Books, Stationery & Music.6 North St.MIDDLETOWN. N.Y.

MORGAN & HANFORD.Books, Stationery & Music.6 North St.MIDDLETOWN. N.Y.

ELDREDGE & BROTHEREDUCATIONAL PUBLISHERS.No.17 NTH.SEVENTH ST.—Philadelphia—

ELDREDGE & BROTHEREDUCATIONAL PUBLISHERS.No.17 NTH.SEVENTH ST.—Philadelphia—


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