KEY AND INDEX 



versity of Pennsylvania. Made a special study 

 of extinct vertebrates. He belonged to that 

 school of evolutionists who believed that the 

 variations caused by environment are inherited 

 by offspring, and upholding these views, became 

 involved in much controversy. 



Copernicus, Nicolaus, ii, 54. Born at Thorn, 

 Prussia, 1473; died at Frauenburg, 1543. Ger- 

 man astronomer. Studied mathematics and 

 other sciences at Cracow, afterward in Italy. 

 Appointed Professor of Mathematics at Rome, 

 1500. 1505, returned to Germany, took holy 

 orders and obtained canonry at Frauenburg. 

 1530, completed his great work "De Revolution- 

 ibus Orbium," which described the true system 

 of the sun, stars and planets. This he did not 

 publish until twelve years later, probably 

 through fear of ecclesiastical censure. 



Corvisart, Jean Nicolas de, iv, 199. Born at 

 Drecourt, France, 1755; died at Paris, 1821. 

 French physician. His father destined him for 

 the law, but he ran away to Paris, and concealed 

 himself in order to study medicine. 1786, be- 

 came professor at La Charite Hospital, Paris. 

 Later on College de France. Member Academy 

 of Sciences. Was first physician to Napoleon I. 

 Made valuable contributions to pathological 

 anatomy regarding diseases of the heart. 



Croll, Dr. James, iii, 197. Born at Whitefield, 

 1821 ; died in 1890. Scottish geologist. Had but 

 little schooling, but made many valuable contri- 

 butions of geological science, especially in re- 

 gard to climatic changes during the glacial 

 period, and their origin. Published theories as 

 to origin of sun's heat and formation of stars 



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