The History of Biology 393 



1886 Leuckart settled the modern classification of animals ; specialized 

 on parasites. 



1893 Weismann showed that germ-plasm and somatoplasm are distinct. 



1893 Zittel wrote most important work on fossils. 



1888 Finlay ^ discovered the relation 



1898 Reed [-between yellow fever 



1898 Lazear J and the mosquito. 



1898 Howard discovered relation between typhoid fever and the house 

 fly._ 



1900 De Vries, Correns and Tschermak, all working independently, re- 

 discovered Mendel's law of heredity. 



1903 Stiles discovered hookworm in the United States. 



1914 Goddard proved feeble-mindedness a unit character. 



1915 Stockard discovered influence of alcohol on offspring. ■ 



References. 



L. C. Miall, "History of Biology." 

 Baas, "Outlines of the History of Medicine." 

 Garrison, "History of Medicine." 

 Hodge and Dawson, "Civic Biology." 

 Batesen, "Mendel's Principles of Heredity." 

 William A. Locy, "Biology and Its Makers." 

 William A. Locy, "The Main Currents of Zoology." 

 William A. Locy, "The Growth of Biology." 

 Erik Nordenskiold, "Die Geschichte der Biologic" 



