PHOTO-MICROGRAPHS 
AND HOW TO MAKE THEM. 
Ellustratey by Sorty-seven Photographs of Microscopic Gbjects, 
PHOTO-MICROGRAPHS 
REPRODUCED BY THE HELIOTYPE PROCESS. 
BY 
GEORGE M. STERNBERG, M.D., F.R.MS., 
MAJOR AND SURGEON, UNITED STATES ARMY; MEMBER OF THE BIOLOGICAL SOCIETY OF 
WASHINGTON ; HONORARY MEMBER OF THE MICROSCOPICAL SOCIETIES OF BALTIMORE 
AND OF SAN FRANCISCO; FELLOW OF THE AMERICAN ASSOCIATION FOR THE 
ADVANCEMENT OF SCIENCE; ETC., ETC. 
BOSTON: 
JAMES R. OSGOOD AND COMPANY. 
1883. 
A 
