350 ANNOTATED LIST OF PERSONS 



TrScul, Auguste Adolphe Lucien (1818-1896). French botanist. Mem- 

 ber of the Academy of Sciences and Chevalier of the Legion of 

 Honor. Made botanical collections in the United States and North 

 Mexico. Adversary of Pasteur. 



" Heterogenesis is a natural operation by which life, on the point 

 of abandoning an organized body, concentrates its action on some 

 particles of that body and forms thereof beings quite different 

 from that of the substance which has been borrowed" (Tr6cul, 

 1867). 



Turpin, Pierre Jean Francois (1775-1840). French artist and botanist- 

 Wrote "Iconographie ve'getale" (Paris, 1841). Illustrated Hum- 

 boldt's works. 



Tyndall, John (1820-1893). English physicist. Studied under Bunsen 

 at Marburg. Professor in the Royal Institution in London. Wrote 

 with Huxley, and independently, on glaciers and showed their 

 movement to be due to fracture and refreezing. Studied heat, 

 light, sound and fermentation. Discovered intermittent steriliza- 

 tion. President of the British Association for the Advancement 

 of Science at the Belfast meeting. A friend of Pasteur and op- 

 ponent of Bastian. A great teacher and popularizer of modern 

 science. For portraits see Pop. Sci. Monthly, Nov., 1872, Harper's 

 Mag., 1888, p. 831, and Critic, 1893, p. 382. 



Van-t-Hoff, Jacobus Hendrikus (1852-1911). Dutch chemist and 

 physicist. Professor in Amsterdam and then in Berlin. A great 

 stereo-chemist and one of the founders of physical chemistry. 

 Born in Rotterdam. In 1876 he was decent in physics in the veteri- 

 nary school in Utrecht, hence one of the German chemists, who 

 was worsted in an argument, called him "horse doctor." For 

 portraits see "Chemisch Weekblad" Amsterdam, Oct. 15, 1910, 

 and Les prix Nobel en 1901, p. 76. 



Van Tieghem, Philippe Edouard Leon (1839-1914). French botanist. 

 Entered the Normal School in 1858. Professor in the Normal School, 

 in the Sorbonne and in the Museum of Natural History. Member of 

 the Academy of Sciences and of the Legion of Honor. Friend of 

 Pasteur. Author of numerous important researches, chiefly anatom- 

 ical and morphological. The second edition of his important 

 "TraitS de Botanique" (pp. xxxi, 1855) was published in Paris in 

 1891. Editor of "Ann. des Sci. Nat. Bot." for thirty-two years. 

 For portrait see Ann. des Sci. Nat. Bot., Tome XIX, No. 1, 1914. 



Varro, or Varrone. Roman poet and prose writer of the Second Century. 

 Among many other things he wrote "Rerum rusticarum." 



Vergnette-Lamotte, Gerard Alfred Vicomte de (1806-1886). 



