246 



Turkey Liike iis ;i unit of enviroinnLMit. 'I'o. 



209. 

 Turkey Liike. illustiMtious of, "ii5. 21(). 217. 

 Turkey L;ike. inluihitniits of. '95, £.'59. 

 Turkey Lake, plankton of. 'Wi, 287. 

 Turkey Lake, variation in, '9.'j, 265. 

 Turkey Lake, work at, '97, 207. 

 Turtles, habits of, '93, 224. 

 Turtles, observation? on, '91, 12ii. 

 Two-ocean i)ass, '92, 29. 

 Tyloderiua foreolatum, '92, 91. 

 Typhloniolge, eye of, '98, 251. 

 Typhlotriton spelaeu.s, eyes of, '98, 252. 



UDEOPSYLLA NIGRA. '92, 153. 



Ulinc, E. B.. '92. 42. 



UI1UU.S americana, '91. 140. 



Illrey, A, B., '92, 6.3; 'y3, 224, 226, 229; '94, 66, 

 HO, l;i5; '95, 147, 148; '96, 224; '97, 232. 



Unibelliferae, '91,28. 



Uinbellifers, '91. 13. 



T^nconsciou.? mental cerebration. '95,42. 



Underwood, L. M„ '91, 83.89,92; '92,41,48, 

 49; '93,13,20,30,254; '94,66,67,132,133,144; 

 '96, 171. 



Unionidae of Ohio River. '94. 1.39. 



Ilnionidae, Parvus group of, '95, 108. 



United States coast and geological survey, 

 '91, 26. 



United States Fish Commission, '91, 24. 



United States Fish Commission steamer Al- 

 batross, '92, 56. 



Univalves, fresh water, '93, 150, 



Uranoscopidae, '91, 25. 



Uredineae of Madison and Noble Counties. 

 '98. 186. 



Urinator imbrex, '91, 166. 



Urine, blood in, '91, 25. 



Uroglena in Lafayette, '96, 56. 



YALENCES, determination of, '92, 169. 

 Yalue of seed characters in determining 



specific rank in the genus Plantago, '94, 67. 

 Yalue of steam pipe in the smokebo.x of the 



locomotive, '93, 271. 

 Yanderburgh County mounds. '96, 68. 

 Yan der Waal's equation, '92, 25. 

 Yan Nuys, T. C, '91, 51, 48; '93, 262, 265. 

 Yapor densities, determination of, '00, 95. 

 Yariatioris in the color pattern of Etheos- 



toma caprodes, '93, 231. 

 • Yariation in Etheostoma, '94. 1?>5, 

 "S'ariation of Ethiostoma caprodes, '95,278. 

 Yariation in Leuci.-cus, '94, 87. 

 Yariations of Polyporus Lucidus, '94, 1.32. 

 Yariation of species, two cases of. '98, 288. 



^'ariation of astandanl thcrin<iitietcr, ■95,t)3. 

 A'ariations in strength of timber for differ- 

 ent parts of the cross section. '93, 268. 

 A'ariation, the study of, '95, 265. 

 Yeateh. Arthur C '97, 266. 

 Yegetable and mineral niatler from a snow 



storm. '92. 29. 

 Yegetable diet, indigestible structures, etc., 



'98, 62. 

 Yegetable physiology, new apparatus for, 



'91, 62. 

 Yegetable powders, examination of. 'iK), 120. 

 Yegetable powders, staining of, "00, 1'20. 

 Yegetation house as an aid in research, 'W, 



138. 

 Yenous sinuses, sujiply of blood to, '9H, 229. 

 Yeratum woodii, '91, 29. 

 Yermillion. Newt., notes on, '91, 144. 

 Yernonia fasciculata, '92, 132. 

 Yernonia, heads of, methods of infiltrating 



and staining, in toto, '94, 120. 

 Yernonica pasciculata, '91, 144. 

 Yertebrae in fishes, '91. 24. 

 Yertebrates, cold blooded of Winona Lake, 



'CH), 218. 

 Vesuvian cycle. '98, 72. 

 Yigo County Compositae, '91, 15. 

 Yigo County drift. '91, 28. 

 YigoCounty fish, '91, 19. 

 Yigo County geology, '91,28. 

 Yigo County, notes on the reptilian fauna of, 



'94, 68. 

 Yiolapedata, '91,30. 

 Yiscosity, empirical formula for, '95, 84. 

 Yiscosity of a polarized dielectric. '95, 77. 

 Yiviparidae, geographic and hypsometric 



distribution of, in the U. S., '93, 225. 

 Yolatile matter in bituminous coal. '%, 113. 

 Yolumetric determination of phosphorus in 



steel. '94,51. 

 Yoris, J. H., '98, 233. 



WABASH COUNTY, additions to fish fauna 



of, '94, 68. 

 Wabash County, batrachians and reptiles of, 



'94, 80.- 

 Wabash County, birds of, '94, 80; '95, 148. 

 Wabash County, fishes of, '93, 229. 

 AVabash County, occurrence of whistling 



swan in, '94,80. 

 AVabash County, Russian thistle, '96, 224. 

 AVabash County, the flowering plants of, '94, 



66. 

 Wabash drainage system, development of, 



'GO, 184. 

 Wabash Erie divide, '91,18. 



