MEET THE AUTHORS 443 



LeEUWENHOEK, ANTONY VAN 



A famous student of minute objects. Born in 1632, died 1723. Held numerous 

 jobs during which he carried on his scientific investigations with the aid of 

 lenses and simple microscopes- which he fashioned himself. Wrote over 400 

 letters describing his findings. Called the "Father of Protozoology and 

 Bacteriology" because he was the first to see living protozoans and bacteria 

 under a lens. Also the first actually to see blood circulating, noted the stripe 

 in voluntary muscles, structure of the crystalline lens and the morphology of 

 the sperm. 



Lewis, dr. paul a. 

 Dr. Lewis was associated with the Rockefeller Institute. A martyr to science, 

 he died in Brazil while investigating the cause of yellow fever. 



Linton, dr. ralph 

 Department of Anthropology, Columbia University. The fields of the 

 ethnology (study of races) of Polynesia and Madagascar claim much of his 

 attention. 



MaTZKE, dr. EDWIN B. 



Associate Professor of Botany, Columbia University. Dr. Matzke is working 

 on general problems of cell size and shape and has worked out some interest- 

 ing techniques here. 



Mickey, karl b. 

 Late member of the Public Relations Department, International Harvester 

 Company. 



MOHR, DR. OTTO L. 



Professor of Medicine, Royal Frederick University, Oslo, Norway. 



Morgan, dr. thomas hunt 

 Late professor at the California Institute of Technology. Dr. Morgan prob- 

 ably did more to further Mendelism than any other man. He has been 

 honored by at least eight Universities with honorary degrees for his work in 

 experimental embryology, heredity, sex, genes and the genetics of Drosophila. 



Newman, dr. horatio h. 



Emeritus Professor of Zoology, University of Chicago. Dr. Newman is known 

 chiefly for his textbooks and his work on twins but evolution and animal be- 

 havior are also his major studies. 



OSBORN, brig, general FREDERICK 



Chief of Special Service, War Department and Director of the Eugenics 

 Research Association. He is also Director of the Galton Society, a group 

 interested in the study of eugenics. 



OVERHOLSER, DR. WINFRED 



Superintendent of St. Elizabeth's Hospital, Washington, D.C. He has both 

 the M.D. and the Ph.D. degrees and has been associated with many state 

 hospitals and mental institutes. He is regarded as a leader in the fields of 

 psychiatry, hospital administration and gerontology (the study of old age.) 



Patri, angelo 

 Teacher and principal in New York City public schools since 1898. Associated 

 with "Children's Activities." 



Pearse, dr. a. s. 

 Zoology Department, Duke University. Dr. Pearse has been honored in many 

 places for his pioneer work in ecology. 



