350 ANNOTATED LIST OF PERSONS 



Trecul, 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" (Tr4cul, 

 1867). 



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

 Wrote "Iconographie vegetale" (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 move- 

 ment to be due to fracture and refreezing. Studied heat, light, sound 

 and fermentation. Discovered intermittent sterilization. Presi- 

 dent of the British Association for the Advancement of Science 

 at the Belfast meeting. A friend of Pasteur and opponent 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 docent in physics in the veterinary 

 school in Utrecht, hence one of the German chemists, who was worsted 

 in an argument, called him "horse doctor." For portraits see "Chem- 

 isch 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 "Traite' 

 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). 



