362 



CIVIC BIOLOGY 



1839 Agassiz : wrote on fresh- water 

 fishes 



1841 Helmholtz : discovered rate of 

 nerve impulse 



1853 Mohl : studied protoplasm (liv- 

 ing substance) 



1857 Pasteur: studied fermentation 



1858 Darwin : reported his work 



upon the origin of species 

 by natural selection 



1858 Wallace : reported his work 

 upon the origin of species 

 by natural selection 



1858 Virchow : worked out cellular 

 pathology ; founder of mod- 

 ern pathology 



1863 Huxley: wrote "Evidence as 

 to Man's Place in Nature" 



1863 Lyell: wrote ff The Antiquity 

 of Man" 



1865 Sachs: studied structural bot- 

 any 



"1865 Mendel: discovered the law of 

 heredity 



1867 Lister : worked out aseptic 

 surgery 



1875 Galton : studied inheritance 



1875 

 1880 

 1880 

 1886 



1893 

 1898 

 1888 

 1898 

 1898 



1900 

 f^/wv 

 1900 



1903 

 1914 

 1915 



Hertwig, O. : studied ferti- 



lization 

 Koch : proved the relation of 



bacteria to disease 

 Laveran : discovered malarial 



parasite (in the mosquito) 

 Leuckart: settled the modern 



classification of animals ; 



specialized on parasites 

 Weismann: studied germ-plasm 

 Reed "] discovered relation 

 Finlay \- between yellow fever 

 Lazear J and the mosquito 

 Howard : discovered relation 



between typhoid fever and 



the house fly 



Correns 



mi i covered Menders 



Tschermak 



^ law of heredity 



Stiles : discovered hookworm 

 in the United States 



Goddard : proved feeble-mind- 

 edness a unit character 



Stockard: discovered influence 

 of alcohol on offspring 



