BIOGRAPHICAL INDEX 



a theory of spontaneous generation and of evo- 

 lution of species. 



Olbers, Heinrich Wilhelm Matthias, iii, 40. 

 Born near Bremen, Germany, 1758; died at Bre- 

 men, March 2, 1840. German physician and 

 astronomer. He discovered several comets and 

 the planetoids, Pallas and Vesta, and discov- 

 ered a method of calculating cometary orbits. 



Owen, Sir Richard, iv, 207. Born at Lancas- 

 ter, England, July 20, 1804; died at London, 

 Dec. 18, 1892. English paleontologist and com- 

 parative anatomist. From 1836-1856, he was 

 Hunterian Professor of Anatomy and Physiol- 

 ogy in the London College of Surgeons. He 

 was conspicuous in the field of microscopy, and 

 in 1833 discovered the "Trichina spiralis" in the 

 tissues of the human body. 



Paget, Sir James, iv, 207. Born at Yarmouth, 

 England, Jan. n, 1714; died at London, Dec. 30, 

 1899. English physician and surgeon. He dis- 

 covered the presence of "Trichina spiralis" in 

 human muscular tissue while a student in St. 

 Bartholomew's Hospital in 1833. At one time 

 president of the Royal College of Surgeons. 



Papin, Denis, vi, 88. Born at Blois, France, 

 Aug. 22, 1647; died in 1712. French physicist. 

 As early as 1688 he conceived the idea of ma- 

 king use of a piston working tightly in a cylin- 

 der, and a little later added the idea of pro- 

 ducing a vacuum in a cylinder steps toward 

 the invention of the steam-engine. 



Paracelsus, Philippus Aureolus, ii, 159. Born 

 at Switzerland, Dec. 17, 1493; died at Salzburg, 

 Sept. 23, 1541. German-Swiss physician and 

 alchemist. He gave a great impetus to the study 



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