122 REPORT OF NATIONAL MUSEUM, 1!>20. 



etc, was made and contributed by Mr. Charles A. Myers. Jr.. of tin- 

 Dodge and Olcott Company. A model of a peppermint still, to sho 

 the type of still most used in obtaining the essential oil from Leaves 

 and herbs, was constructed in the laboratory of the division of tex- 

 tiles, from plans furnished by the A. M. Todd Company of K 

 mazoo. Michigan, Another model, that of a birch oil still, was 

 scribed in last year's report. 



Much material for an attractive exhibit of materia medica derive i 

 from the mineral kingdom was obtained during the year. In m 

 cine these substances are called "chemicals" in contradistinction 

 "galenicals." which are medicinal substances approved of by Galen, 

 a celebrated Greek physician and medical writer of the second cen- 

 tury, who opposed the use of chemical drugs. The exhibit shows 

 samples of the ores which are the principal sources of these medi- 

 cines, photographs of the mining of each element represented, anil 

 specimens of the official medicinal substances. Several linns con- 

 tributed to the completion of this exhibit as follows: The Powers- 

 YVeightman-liosengarten Company of Philadelphia. 59 specimens 

 of inorganic chemicals; E. E. Squibb and Sons. New York City. 51 

 specimens of medicinal chemicals; photographs showing mining of 

 the original ores were received by transfer from the [J. S. Geological 

 Survey, and by gift from Dr. Thomas L. Watson. State Geologist, 

 Charlottesville. Virginia. 



A corresponding exhibit, illustrating the animal sources of medi- 

 cines, also received some additions during the year. Help toward 

 this end was given by the contribution of specimens or photograph-, 

 as follows : 



Armour and Company, Chicago. Illinois, 12 medicinal prepara- 

 tions and ten photographs; E. R. Squibb and Sons. Xew York City, 

 ten specimens; McKesson and Bobbins, Incorporated, Xew Y^ork 

 City, seven specimens; Parke, Davis and Company, Detroit. Michi- 

 gan, six specimens; and photographs of domestic animals, insects, 

 and iishes which yield medicinal substances were received by trans- 

 fer from the Departments of Agriculture and Commerce. 



The Museum is much indebted to Dr. W. A. Dewey, Registrar of 

 the Homeopathic Medical School, University of Michigan, Ann 

 Arbor, Michigan, who continued his valuable cooperation in collect- 

 ing articles and specimens to illustrate the history and principles of 

 the Homeopathic School of Medicine. The more important of these 

 contributions may be named as follows: A bronze medallion of Dr. 

 Hahnemann, " The Founder of Homeopathy,'* executed by the fa- 

 mous French sculptor, Pierre Jean David D'Angers, between 1836 and 

 1838, was the gift of Dr. Joseph C. Guernsey of Bryn Mawr, Penn- 

 sylvania. This medallion was brought to America by Dr. Adolph 

 Ferdinand Haynel, one of the early homeopathic physicians of Balti- 



