The Project Gutenberg eBook ofBloodletting Instruments in the National Museum of History and TechnologyThis ebook is for the use of anyone anywhere in the United States and most other parts of the world at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this ebook or online atwww.gutenberg.org. If you are not located in the United States, you will have to check the laws of the country where you are located before using this eBook.Title: Bloodletting Instruments in the National Museum of History and TechnologyAuthor: Audrey B. DavisToby A. AppelRelease date: July 7, 2010 [eBook #33102]Language: EnglishCredits: Produced by Chris Curnow, Joseph Cooper and the OnlineDistributed Proofreading Team at http://www.pgdp.net.*** START OF THE PROJECT GUTENBERG EBOOK BLOODLETTING INSTRUMENTS IN THE NATIONAL MUSEUM OF HISTORY AND TECHNOLOGY ***
This ebook is for the use of anyone anywhere in the United States and most other parts of the world at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this ebook or online atwww.gutenberg.org. If you are not located in the United States, you will have to check the laws of the country where you are located before using this eBook.
Title: Bloodletting Instruments in the National Museum of History and TechnologyAuthor: Audrey B. DavisToby A. AppelRelease date: July 7, 2010 [eBook #33102]Language: EnglishCredits: Produced by Chris Curnow, Joseph Cooper and the OnlineDistributed Proofreading Team at http://www.pgdp.net.
Title: Bloodletting Instruments in the National Museum of History and Technology
Author: Audrey B. DavisToby A. Appel
Author: Audrey B. Davis
Toby A. Appel
Release date: July 7, 2010 [eBook #33102]
Language: English
Credits: Produced by Chris Curnow, Joseph Cooper and the OnlineDistributed Proofreading Team at http://www.pgdp.net.
*** START OF THE PROJECT GUTENBERG EBOOK BLOODLETTING INSTRUMENTS IN THE NATIONAL MUSEUM OF HISTORY AND TECHNOLOGY ***
Davis, Audrey, and Toby Appel. Bloodletting Instruments in the National Museum of History and Technology.Smithsonian Studies in History and Technology, number 41, 103 pages, 124 figures, 1979.—Supported byavariety of instruments, bloodletting became a recommended practice in antiquity and remained an accepted treatment for millenia. Punctuated by controversies over the amount of blood to take, the time to abstract it, and the areas from which to remove it, bloodletters employed a wide range of instruments. All the major types of equipment and many variations are represented in this study of the collection in the National Museum of History and Technology.
Official publication dateis handstamped in a limited number of initial copies and is recorded in the Institution’s annual report,Smithsonian Year.Cover design: “Phlebotomy, 1520” (from Seitz, 1520, as illustrated in Hermann Peter,Der Arzt und die Heilkunst, Leipzig, 1900; photo courtesy of NLM).
Library of Congress Cataloging in Publication DataDavis, Audrey BBloodletting instruments in the National Museum of History and Technology.(Smithsonian studies in history and technology; no. 41)Bibliography: p.Supt. of Docs, no.: SI 1.28:411. Bloodletting—Instruments—Catalogs. 2. Bloodletting—History. 3. National Museum of Historyand Technology. I. Appel, Toby, 1945—joint author. II. Title. III. Series: SmithsonianInstitution. Smithsonian studies in history and technology; no. 41 [DNLM: 1. Bloodletting—History.2. Bloodletting—Instrumentation—Catalogs. 3. Bloodletting—Exhibitions—Catalogs.RM182.D38617'.917878-606043
Library of Congress Cataloging in Publication DataDavis, Audrey BBloodletting instruments in the National Museum of History and Technology.(Smithsonian studies in history and technology; no. 41)Bibliography: p.Supt. of Docs, no.: SI 1.28:41
1. Bloodletting—Instruments—Catalogs. 2. Bloodletting—History. 3. National Museum of Historyand Technology. I. Appel, Toby, 1945—joint author. II. Title. III. Series: SmithsonianInstitution. Smithsonian studies in history and technology; no. 41 [DNLM: 1. Bloodletting—History.2. Bloodletting—Instrumentation—Catalogs. 3. Bloodletting—Exhibitions—Catalogs.
RM182.D38617'.917878-606043
Among the many catalogs of museum collections, few describe objects related to the practice of medicine. This catalog is the first of a series on the medical sciences collections in the National Museum of History and Technology (NMHT). Bloodletting objects vary from ancient sharp-edged instruments to the spring action and automatic devices of the last few centuries. These instruments were used in a variety of treatments supporting many theories of disease and therefore reflect many varied aspects of the history of medicine. Beginning with an essay sketching the long history of bloodletting, this catalog provides a survey of the various kinds of instruments, both natural and man-made, that have been used throughout the centuries.
It is a pleasure to thank the Smithsonian Research Foundation, the Commonwealth Foundation, and the Houston Endowment for their financial support of this project.
Miss Doris Leckie, who did much of the preliminary research and organized part of the collection that led to a draft of this catalog with special emphasis on the cupping apparatus, receives our highest gratitude. Her public lectures on the topic drew much praise. The usefulness of this catalog is due in no small part to her devoted efforts.
For photographing the Smithsonian objects so well we thank Richard Hofmeister, John Wooten, and Alfred Harrell of the Smithsonian Office of Printing and Photographic Services. For analyzing selected objects and answering our requests promptly we thank Dr. Robert Organ, chief; Barbara Miller, conservation director; and Martha Goodway, metallurgist, of the Conservation Analytical Laboratory.
To those who helped us to solve specific problems we extend appreciation to Dr. Arthur Nunes; Dr. Uta C. Merzbach, curator of mathematics, NMHT (especially for finding the poem by Dr. Snodgrass); and Silvio Bedini, deputy director, NMHT, whose enthusiasm and unmatched ability for studying objects has sustained us throughout the period of preparation.
While it is traditional to add a reminder that various unnamed people contributed to a publication, it is imperative to state here that numerous people are essential to the collection, conservation, preservation, and exhibition of museum objects. Without them no collection would survive and be made available to those who come to study, admire or just enjoy these objects. We hope this catalog brings out some of the joy as well as the difficulties of maintaining a national historical medical collection.
Bloodletting, the removal of blood from the body, has been practiced in some form by almost all societies and cultures. At various times, bloodletting was considered part of the medical treatment for nearly every ailment known to man. It was also performed as punishment or as a form of worship to a Superior Power or Being. It still retains therapeutic value today, although only for an extremely limited range of conditions. In early attempts to extract blood from the body, the skin was penetrated in various places with a sharp instrument made of stone, wood, metal, bristle, or any other rigid material. When it was recognized that a vein visible on the surface of the skin as a blue-green stripe contained blood, the vein was incised directly. To facilitate “breathing a vein” and to provide greater safety, more refined and sharper instruments were devised. As theories supporting bloodletting grew more complex, so too did the instruments.
Spontaneous forms of bleeding, including nosebleed, menstruation, and those instances produced by a blow to any part of the body, apparently inspired the earliest human bloodletters. The Egyptians claimed that the hippopotamus rubbed its leg against a sharp reed until it bled to remove excess blood from its body.[1]The Peruvians noted that a bat would take blood from the toe of a sleeping person when the opportunity presented itself. A deer, and goat, would pick a place near its diseased eye for relief.[2]The methods employed by animals increased interest in using artificial methods for letting blood in man.
The devices man has employed to remove blood from the body fall into two major categories: (1) those instruments used for general bloodletting, that is, the opening of an artery, or more commonly a vein, and (2) those instruments used in local bloodletting. Instruments in the first category include lancets, spring lancets, fleams, and phlebotomes. Associated with these are the containers to collect and measure the blood spurting from the patient. In the second category are those instruments associated with leeching and cupping. In both of these methods of local bloodletting, only the capillaries are severed and the blood is drawn from the body by some means of suction, either by a leech or by an air exhausted vessel. Instruments in this category include scarificators, cupping glasses, cupping devices, and many artificial leeches invented to replace the living leech.
Much effort and ingenuity was expanded, especially in the eighteenth and nineteenth centuries, to improve the techniques of bloodletting. In the eighteenth century, delicate mechanical spring lancets and scarificators were invented to replace the simpler thumb lancets and fleams. In the nineteenth century, as surgical supply companies began to advertise and market their wares, many enterprising inventors turned their hand to developing new designs for lancets and scarificators, pumps, fancy cupping sets, rubber cups, and all manner of cupping devices and artificial leeches. If we also consider treatments related to bloodletting, in which blood is transferred from one part of the body to another, without actual removal from the body, then we can add the many inventions devoted to dry cupping, irritating the body, and exhausting the air around limbs or even the entire body. Although many physicians continued to use the traditional instruments that had been used forcenturies, many others turned eagerly to the latest gadget on the market.
Bloodletting instruments, perhaps the most common type of surgical instrument little more than a century ago, are now unfamiliar to the average person. When one sees them for the first time, one is often amazed at their petite size, careful construction, beautiful materials, and elegant design. One marvels at spring lancets made of silver, thumb lancets with delicate tortoise shell handles, and sets of hand-blown cups in the compartments of a mahogany container with brass and ivory latches and a red plush lining. Those finding such instruments in their attic or in a collection of antiques, even if they can determine that the instruments were used for bloodletting, often have no idea when the instruments were made or how they were used. Frequently a veterinary spring lancet or fleam is mistaken for a human lancet, or ascarificatorfor an instrument of venesection. Almost nothing has been written to describe these once common instruments and to place them in historical context. Historians who study the history of medical theory usually ignore medical practice, and they rarely make reference to the material means by which a medical diagnosis or treatment was carried out. It is hoped that this publication will fill a need for a general history of these instruments. This history is pieced together from old textbooks of surgery, medical encyclopedias, compilations of surgical instruments, trade catalogs, and the instruments themselves.
The collection of instruments at the National Museum of History and Technology of the Smithsonian Institution contains several hundred pieces representing most of the major types of instruments. Begun in the late nineteenth century when medical sciences were still part of the Department of Anthropology, the collection has grown steadily through donations and purchases. As might be expected, it is richest in bloodletting instruments manufactured in America in the nineteenth century. One of its earliest acquisitions was a set of four flint lancets used by Alaskan natives in the 1880s. A major source for nineteenth-century instruments is the collection of instruments used by the members of the Medical and Chirurgical Faculty of Maryland, a medical society founded in 1799. The Smithsonian collection also includes patent models of bloodletting instruments submitted to the U.S. Patent Office by nineteenth-century inventors and transferred to the Smithsonian in 1926.
Because we have made an effort to survey every major type of instrument related to bloodletting, it is hoped that this publication will serve as a general introduction to bloodletting instruments, and not merely a guide to the Smithsonian collection. With this goal in mind, the catalog of bloodletting instruments has been preceded by chapters surveying the history of bloodletting and describing, in general terms, the procedures and instruments that have been used since antiquity for venesection, cupping, leeching, and veterinary bloodletting. In the course of our research we have consulted several other collections of bloodletting instruments, notably the collections of the Wellcome Museum of London, the Armed Forces Institute of Pathology, the College of Physicians in Philadelphia, the Institute of the History of Medicine at the Johns Hopkins University, the Howard Dittrick Medical Museum in Cleveland, and the University of Toronto. Illustrations from these collections and references to them have been included in the cases where the Smithsonian collection lacks a particular type of instrument.
While primary sources describing the procedures and presenting theoretical arguments for and against bloodletting are plentiful, descriptions of the instruments and their manufacture are often difficult to find. Before the nineteenth century, one may find illustrations of bloodletting instruments in the major textbooks on surgery, in encyclopedias such as that of Diderot, and in compendia of surgical instruments written by surgeons. The descriptions following the drawings are often meager and give little indication of where, when, and how the instruments were produced. Until well into the nineteenth century, the tools used by barber-surgeons, surgeons, and dentists were made by blacksmiths, silversmiths, and cutlers. These craftsmen generally left little record of their work. As the demand for surgical instruments increased, specialized surgical instrument makers began to appear, and the cutler began to advertise himself as “Cutler and Surgical Instrument Maker” ratherthan simply “Cutler and Scissor Grinder.” A few advertising cards dating from the eighteenth century may be found, but the illustrated trade catalog is a product of the nineteenth century. Among the earliest compendia/catalogs of surgical instruments written by an instrument maker, rather than by a surgeon, was John Savigny’sA Collection of Engravings Representing the Most Modern and Approved Instruments Used in the Practice of Surgery(London, 1799). This was followed a few decades later by the brochures and catalog (1831) of the famous London instrument maker, John Weiss. By the 1840s John Weiss, Charrière of Paris, and a few other instrument makers had begun to form surgical supply companies that attempted to market instruments over a wide area. While there are a handful of company trade catalogs dating from the 1840s, 1850s, and 1860s, the great influx of such catalogs came after 1870. Trade catalogs, a major source of information on the new instruments of the nineteenth century, provide the historian with line drawings, short descriptions indicating the mechanism and the material of which the instrument was composed, prices, and patent status. For more details on nineteenth-century instruments one must turn to brochures and articles in medical journals introducing the instruments to the medical profession. These sources provide the most detailed descriptions of how the instruments were constructed, how they were used, and why they were invented. For many American instruments, the descriptions available at the U.S. Patent Office offer illustrations of the mechanism and a discussion of why the instrument was considered novel. One finds specifications for many bizarre instruments that never appear in trade catalogs and may never have been actually sold.
A final source of information is the instruments themselves. Some are engraved with the name of the manufacturer, and a few are even engraved with the date of manufacture. Some have been taken apart to study the spring mechanisms and others examined in the Conservation Analytical Laboratory of the Smithsonian Institution to determine their material content. The documentation accompanying the instruments, while sometimes in error, may serve to identify the individual artifact by name, place and date of manufacture, and to augment our knowledge of the historical setting in which these instruments were used.
The history of bloodletting has been marked by controversy. The extensive literature on bloodletting contains numerous polemical treatises that both extol and condemn the practice. Bloodletting was no sooner criticized as ineffective and dangerous than it was rescued from complete abandonment by a new group of zealous supporters.
From the time of Hippocrates (5th centuryB.C.)—and probably before, although no written record is available—bloodletting had its vocal advocates and heated opponents. In the 5th centuryB.C.Aegimious of Eris (470B.C.), author of the first treatise on the pulse, opposed venesection, while Diogenes of Appolonia (430B.C.), who described the vena cava with its main branches, was a proponent of the practice. Hippocrates, to whom no specific text on bloodletting is attributed, both approved and recommended venesection.[3]
The anatomist and physician Erasistratus (300-260B.C.), was one of the earliest physicians to leave a record of why he opposed venesection, the letting of blood from a vein. Erasistratus, who practiced at the court of the King of Syria and later at Alexandria, a celebrated center of ancient medicine, recognized that the difficulty in estimating the amount of blood to be withdrawn and the possibility of mistakenly cutting an artery, tendon, or nerve might cause permanent damage or even death. Since Erasistratus believed that only the veins carried blood while the arteries contained air, he also feared the possibility of transferring air from the arteries into the veins as a result of venesection. Erasistratus was led to question how excessive venesection differed from committing murder.[4]
Through the writings of Aulus Cornelius Celsus (25B.C.-?), the Roman encyclopedist, and Galen (ca.A.D.130-200) venesection was restored as a form of orthodox medical treatment and remained so for the next fifteen hundred years. By the time of Celsus, bloodletting had become a common treatment. Celsus remarked in his well-known account of early medicine: “To let blood by incising a vein is no novelty; what is novel is that there should be scarcely any malady in which blood may not be let.”[5]Yet criticism of bloodletting continued, for when Galen went to Rome inA.D.164 he found the followers of Erasistratus opposing venesection. Galen opened up discussion with these physiciansin two books,Against ErasistratusandAgainst the Erasistrateans Dwelling in Rome. These argumentative dialectical treatises, together with hisTherapeutics of Venesection, in which he presented his theory and practice of venesection, established Galen’s views on bloodletting, which were not effectively challenged until the seventeenth century.[6]
The fundamental theory upon which explanations of health and disease were based, which had its inception in ancient Greek thought and lasted up to the eighteenth century, was the humoral theory. Based on the scientific thought of the Pre-Socratics, the Pythagoreans, and the Sicilians, this theory posited that when the humors, consisting of blood, phlegm, yellow bile, and black bile, were in balance within the body, good health ensued. Conversely, when one or more of these humors was overabundant or in less than adequate supply, disease resulted. The humors were paired off with specific qualities representing each season of the year and the four elements according to the well-accepted doctrine of Empedocles, in which all things were composed of earth, air, fire, and water. Thus, yellow bile, fire, and summer were contrasted to phlegm, water, and winter, while blood, air, and spring were contrasted to black bile, earth, and autumn. When arranged diagrammatically, the system incorporating the humors, elements, seasons, and qualities appears as shown in Figure1. The earliest formulation of humoralism was to be found in the physiological and pathological theory of the Hippocratic treatise,On the Nature of Man.[7]
Plethora, an overabundance of body humors, including blood, which characterized fevers and inflammations, was properly treated by encouraging evacuation. This could be done through drugs that purged or brought on vomiting, by starvation, or by letting blood. During starvation the veins became empty of food and then readily absorbed blood that escaped into the arteries. As this occurred, inflammation decreased. Galen suggested that instead of starvation, which required some time and evacuated the system with much discomfort to the patient, venesection should be substituted to remove the blood directly.[8]
Peter Niebyl, who has traced the rationale for bloodletting from the time of Hippocrates to the seventeenth century, concluded that bloodletting was practiced more to remove excess good blood rather than to eliminate inherently bad blood or foreign matter. Generally, venesection was regarded as an equivalent to a reduction of food, since according to ancient physiological theory, food was converted to blood.[9]
Figure 1.—Chart of elements, seasons, and humors.
Galen defined the criteria for bloodletting in terms of extent, intensity, and severity of the disease, whether the disease was “incipient,” “present,” or “prospective,” and on the maturity and strength of the patient.[10]Only a skilled physician would thus know when it was proper to bleed a patient. Venesection could be extremely dangerous if not correctly administered, but in the hands of a good physician, venesection was regarded by Galen as a more accurate treatment than drugs. While one could measure with great accuracy the dosages of such drugs as emetics, diuretics, and purgatives, Galen argued that their action on the body was directed by chance and could not easily be observed by the physician.[11]However, the effects of bloodletting were readily observed. One could note the change in the color of the blood removed, the complexion of the patient, and the point at which the patient was about to become unconscious, and know precisely when to stop the bleeding.
Galen discussed in great detail the selection of veins to open and the number of times blood might be withdrawn.[12]In choosing the vein to open, its location in respect to the disease was important. Galen recommended that bleeding be done from a blood vessel on the same side of the body as the disease. For example, he explained that blood from the right elbow be removed to stop a nosebleed from the right nostril.[13]Celsus had argued for withdrawing blood near the site of the disease for “bloodletting draws blood out of the nearest place first, and thereupon blood from more distant parts follows so long as the letting out of blood is continued.”[14]
Controversy over the location of the veins to be opened erupted in the sixteenth century. Many publications appeared arguing the positive and negative aspects of bleeding from a vein on the same side (derivative—from the Latinderivatiofrom the verbderivare, “to draw away,” “to divert”) or the opposite side (revulsion—from the Latinrevulsio, “drawing in a contrary direction”) of the disordered part of the body. This debate mirrored a broader struggle over whether to practice medicine on principles growing out of medieval medical views or out of classical Greek doctrines that had recently been revived and brought into prominence. The medieval practice was based on the Moslem medical writers who emphasized revulsion (bleeding from a site located as far from the ailment as possible).[15]This position was attacked in 1514 by Pierre Brissot (1478-1522), a Paris physician, who stressed the importance of bleeding near the locus of the disease (derivative bleeding). He was declared a medical heretic by the Paris Faculty of Medicine and derivative bleeding was forbidden by an act of the French parliament. In 1518, Brissot was exiled to Spain and Portugal. In 1539, the celebrated anatomist, Andreas Vesalius, continued the controversy with his famousVenesection Letter, which came to the support of Brissot.[16]
Only with the gradual awareness of the implications of the circulation of the blood (discovered in 1628) did discussion of the distinction between derivative and revulsive bloodletting become passé.[17]Long after the circulation of the blood was established, surgical treatises such as those of Lorenz Heister (1719) recommended removing blood from specific parts of the body—such as particular veins in the arm, hand, foot, forehead, temples, inner corners of the eye, neck, and under the tongue. In the nineteenth century this practice was still challenged in the literature as a meaningless procedure.[18](Figure2.)
How Much Blood to Take
According to Galen, safety dictated that the first bloodletting be kept to a minimum, if possible. Second, third, or further bleedings could be taken if the condition and the patient’s progress seemed to indicate they would be of value. The amount of blood to be taken at one time varied widely.[19]
Galen appears to have been the first to note the amount of blood that could be withdrawn: the greatest quantity he mentions is one pound and a half and the smallest is seven ounces. Avicenna (980-1037) believed that ordinarily there were 25 pounds of blood in a man and that a man could bleed at the nose 20 pounds and not die.[20]
The standard advice to bloodletters, especially in the eighteenth and nineteenth centuries, was “bleed to syncope.” “Generally speaking,” wrote the English physician and medical researcher, Marshall Hall, in 1836, “as long as bloodletting is required, it can be borne; and as long as it can be borne, it is required.”[21]The American physician, Robley Dunglison, defined “syncope” in his 1848 medical dictionary as a “complete and, commonly, sudden loss of sensation and motion, with considerable diminution, or entire suspension of the pulsations of the heart and the respiratory movements.”[22]Today little distinction is made between shock and collapse, or syncope, except to recognize that if collapse or syncope persists, shock will result.
We know today that blood volume is about one-fifteenth to one-seventeenth the body weight of an adult. Thus an adult weighing 150 pounds has 9 or 10 pounds of blood in his body. Blood volume may increase at great heights, under tropical conditions, and in the rare disease polycythemia (excess red blood cells). After a pint of blood is withdrawn from a healthy individual, the organism replaces it to some degree within an hour or so. However, it takes weeks for the hemoglobin (the oxygen-bearing substance in the red blood cells) to be brought up to normal.
If blood loss is great (more than 10 percent of the total blood volume) there occurs a sudden, systemic fall in blood pressure. This is a well-known protective mechanism to aid blood clotting. If the volume of blood lost does not exceed 30 to 40 percent, systolic, disastolic, and pulse pressures rise again after approximately 30 minutes as a result of various compensatory mechanisms.[23]
Larger Image
Figure 2.—Venesection manikin, 16th century. Numbers indicate locations where in certain diseases venesection should be undertaken. (From Stoeffler, 1518, as illustrated in Heinrich Stern,Theory and Practice of Bloodletting, New York, 1915. Photo courtesy of NLM.)
If larger volumes than this are removed, the organism is usually unable to survive unless the loss is promptly replaced. Repeated smaller bleedings may produce a state of chronic anemia when the total amount of blood and hemoglobin removed is in excess of the natural recuperative powers.
When to Bleed
Selecting a time for bleeding usually depended on the nature of the disease and the patient’s ability to withstand the process. Galen’s scheme, in contrast to the Hippocratic doctrine, recommended no specific days.[24]Hippocrates worked out an elaborate schedule, based on the onset and type of disease, to which the physician was instructed to adhere regardless of the patient’s condition.
Natural events outside the body served as indicators for selecting the time, site, and frequency of bloodletting during the Middle Ages when astrological influences dominated diagnostic and therapeutic thought. This is illustrated by the fact that the earliest printed document relating to medicine was the “Calendar for Bloodletting” issued in Mainz in 1457. This type of calendar, also used for purgation, was known as anAderlasskalender, and was printed in other German cities such as Augsburg, Nuremberg, Strassburg, and Leipzig. During the fifteenth century these calendars andPestblatter, or plague warnings, were the most popular medical literature. Sir William Osler and Karl Sudhoff studied hundreds of these calendars.[25]They consisted of a single sheet with some astronomical figures and a diagram of a man (Aderlassmann) depicting the influence of the stars and the signs of the zodiac on each part of the body, as well as the parts of the anatomy suitable for bleeding. These charts illustrated the veins and arteries that should be incised to let blood for specific ailments and usually included brief instructions in the margin. The annotated bloodletting figure was one of the earliest subjects of woodcuts. One early and well knownAderlassmannwas prepared by Johann Regiomontanus (Johannes Müller) in 1473. It contained a dozen proper bleeding points, each suited for use under a sign of the zodiac. OtherAderlassmannerillustrated specific veins to be bled. The woodcut produced by the sixteenth-century mathematician, Johannes Stoeffer, illustrated 53 points where the lancet might be inserted.[26]
“Medicina astrologica” exerted a great influence on bloodletting. Determining the best time to bleed reached a high degree of perfection in the late fourteenth and fifteenth centuries with the use of volvella or calculating devices adopted from astronomy and navigation. These were carried on a belt worn around the waist for easy consultation. Used in conjunction with a table and a vein-man drawing, the volvella contained movable circular calculators for determining the accuracy, time, amount, and site to bleed for an illness. The dangers of bloodletting elicited both civic and national concern and control. Statutes were enacted that required every physician to consult these tables before opening a vein to minimize the chance of bleeding improperly and unnecessarily. Consultation of the volvella and vein-man was more important than an examination of the patient.[27](Figure3.)
For several centuries, almanacs were consulted to determine the propitious time for bleeding. The “woodcut anatomy” became a characteristic illustration of the colonial American almanac. John Foster introduced the “Man of Signs,” as it was called, into the American almanac tradition in his almanac for 1678, printed in Boston. Other examples of early American almanacs featuring illustrations of bleeding include Daniel Leed’s almanac for 1693, printed in Philadelphia, and John Clapp’s almanac for 1697, printed in New York.
As in many of the medieval illustrations, the woodcut anatomy in the American almanac consisted of a naked man surrounded by the twelve signs of the zodiac, each associated with a particular part of the body (the head and face with Aries, the neck with Taurus, the arms with Gemini, etc.). The directions that often accompanied the figure instructed the user to find the day of the month in the almanac chart, note the sign or place of the moon associated with that day, and then look for the sign in the woodcut anatomy to discover what part of the body is governed by that sign. Bloodletting was usually not specifically mentioned, but it is likely that some colonials still used the “Manof Signs” or “Moon’s Man” to determine where to open a vein on a given day.[28]