BIOGRAPHICAL INDEX 



geographer. Through his writings a good idea 

 of the status of the sciences in his day is gained. 

 He considered the earth a globe, and had a very 

 definite idea of its size. The habitable portion, 

 according to him, extended from Ireland to Cey- 

 lon. 



Struve, F. G. W., iii, 58. Born at Altona, Ger- 

 many, April 15, 1793; died at St. Petersburg, 

 Nov. 23, 1864. A German Russian astronomer. 

 He is remembered particularly for his researches 

 on double stars. 



Swammerdam, John, ii, 297. Born at Amster- 

 dam, Feb. 12, 1637; died there Feb. 15, 1680. 

 Dutch naturalist. He was educated for the min- 

 istry, but turned to the profession of medicine. 

 Later he devoted himself to the study of insects, 

 and his work laid the foundation of the modern 

 science of entomology. 



Sydenham, Thomas, ii, 189. Born in Dorset- 

 shire, England, 1624; died at London, Decem- 

 ber, 1689. Famous English physician. He studied 

 predisposing causes of diseases, and anticipated 

 modern practice in his methods of treating them. 

 In general terms his was what might be termed 

 "rational" treatment. He is remembered par- 

 ticularly for his introduction of the use of lauda- 

 num. 



Sylvius, Franz, ii, 186. Born at Hanan, Prus- 

 sia, 1614; died at Leyden, 1672. Celebrated Ger- 

 man physician. He founded the "latrochemical" 

 school of medicine, whose fellows used medicines 

 and did not accept the "humoral" pathology. One 

 of the fissures in the brain (fissure of Sylvius) is 

 named for him. 



Symington, William, vii, 67. Born at Lead- 



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