Index 



507 



Tropical Eesearch Station, Zoologi- 

 cal Society, N. Y., 63 

 Zone, 180 

 Tropisni theory, 309 et seq. 

 Tschermak, 203 

 Tuatara, 133 



Tuberculosis, 409, 447; sanitarium, 

 477 

 see Blood serum 

 Tung oil tree, 415; ill. 413-4 

 Tunicates, alternation of genera- 

 tions, 100-1 

 development, 100 

 larva, 105 

 mouth, relation to Balanoglossus 



and Vertebrates, 107 

 structure, 100-1, 377 

 see Organ-forming 

 "Tuscarora," 364 

 Twins, see Siamese; Identical 

 Tympanum, see Vertebrates, struc- 

 ture 

 Typhoid, 475, 448; see Flies, Im- 

 munity, Vaccination 



U. S. Fish Commission, see U. S. 



Bureau of Fisheries 

 U. S. Geological, sec Survey 

 U. S. National Museum, building, 



60, ill. 61 

 collections, 39, 61 

 founded, 44 

 Avork, 61-2 

 TJ. S. Navy, ships, 349-50 

 U. S. Public Health Service, 459, 



461, 466 

 work, 474-7 

 U. S. Social Hygiene Board, 476 

 Unit character, see Inheritance, 



Mendelian 

 Universities, State, 50 

 University, see Buffalo, Columbia, 



Johns Hopkins, Michigan, 



Pennsylvania, Yale 

 Upland cotton, hybridization, 268 

 Urea, end product of metabolism, 



296 

 Use and disuse, see Inheritance, ac- 

 quired characters 



U 



Udo, 414; ill. 411-2 

 Uintatherium, 142 ; ill. 141 

 Unicellular, animals, 352, 378 

 see Protozoa 

 organisms, see Plankton 

 reactions, 306, 309 

 plants, 378 ; see Protophyta 

 U. S. Biological Survey, 87 

 collections, 61, 248 

 established, 390 

 work, 162 et seq., 347, 391 et 

 seq., 420, 423, 461 

 U. S. Bureau of Animal Indus- 

 try, 87; collections, 61 

 work, 409, 464, 474 

 U. S. Bureau of Entomology, 87; 

 established, 405 

 work, 405-7, 409 

 U. S. Bureau of Fisheries, 87; col- 

 lections, 61 

 vessels, 156, 350-1, 365, 482-3 

 work, 350-1, 377, 426 ct seq. 

 U. S. Bureau of Plant Industry, 

 87; collections, 61 

 work, 412 et seq. 

 U. S. Bureau of Health, Philip- 

 pines, 441 

 U. S. Coast Survey, 349-50 

 U. S. Exploring Expedition, see 

 Wilkes 



Vaccination, results, 441-2 



opposition, 442-3 



smallpox, 448 



typhoid, 448-9 

 Vaccine, influenza, pneumonia, 476 



preparation, 474-5; see Biologi- 

 cal remedies. Smallpox 

 Van Beneden, 203 

 Variation, cause, 243 et seq., 478 



curve, ill. 241 



fortuitous, 234 



influence environment, 244 et 

 seq. 



kinds, 242-3 



see Geographic races. Selection 

 Vaucheria, sexual reproduction, 



control, 233 

 Vedalia, 406 

 Velella, flotation, ill. 358 

 Venereal disease, control, 476; ex- 

 tent, 444-5 

 Vermin, damage, 393 et seq. 

 Vertebrates, embryos, ill. 104 



ferments, 295 



head, origin, 113-4 



hermaphroditic, 210 



hypophysis, 101 



jaws, origin, 110-1 



limbs, 112 



mouth, 107, 110 



