REPORT OF NATIONAL MUSEUM, 1921. 113 
A set of twelve 8 by 10 inch photographs of exhibits in the division 
of medicine were furnished to Mr. Charles G. Merrell, Cincinnati, 
Ohio, and were by him framed and hung in the Lloyd Library of 
Cincinnati, in order to bring the work of the division to the atten- 
tion of the many professional workers in botany, medicine, and 
pharmacy who frequent that library. 
Mr. Merrell was also furnished a photograph of the model of the 
Birch oil still constructed by the Museum, from which he prepared 
14 lantern slides and presented them to colleges throughout the 
United States for use in lectures in the manufacture of essential 
oils. 
Armour & Company, Chicago, Tl., was furnished with a photo- 
graph of the Museum’s exhibit of animal drugs, part of the material 
for which was furnished by that company. The photograph was 
reproduced in the Armour Magazine for the information of its 
employees. 
Several requests were made during the year by visitors and 
correspondents for copies of two labels, one accompanying the series 
illustrating the composition of the human body, and the other classi- 
fying the specimens arranged to show the development of the heal- 
ing arts. All of the requests were granted. 
