author
1867–1925
A German physician and medical writer, he helped shape early hematology through close work with Paul Ehrlich. His best-known writing brought the microscopic study of blood to a wider professional audience at a time when the field was rapidly changing.

by Paul Ehrlich, Adolf Lazarus
Born in 1867 and deceased in 1925, Adolf Lazarus was a German doctor associated with Berlin’s medical world, including the Charité and the University of Berlin. Surviving catalog and authority records identify him as a physician and place his work within internal medicine and the history of the Berlin medical faculty.
He is best remembered for collaborating with Paul Ehrlich on Histology of the Blood, Normal and Pathological, a landmark medical text that examined blood cells and blood disease in detail. The book remained notable enough to be translated, reprinted, and recorded long after its first publication, which speaks to its lasting value in the history of hematology.
Lazarus also wrote a short book on Paul Ehrlich, suggesting he was not only a colleague but also an interpreter of Ehrlich’s scientific legacy. While easily available biographical details are limited, the record that does survive shows a physician closely tied to some of the most important medical research of his era.