237 



Induration of tertiary rocks in Northeastern 

 Arkansas, '93, 219. 



Infection by bread, '95. 46. 



Infection, contest against, '91, 28. 



Infiltrating and staining in toto of heads of 

 Vernon ia. method of. '94, 120. 



Infinite system of forms, '97. 80. 



Infinity and zero in algebra. '91, 20. 



In memoriara. '97. 20; '98, 20. 



Inoculation of animals with yeasts. '96, 186, 



Insect increase and decrease. '91. 31. 



Insects, injurious, earliest published refer- 

 ence to. '91. 168. 



Insects of Tasmania, '91, 68. 



Integrals, reduction of, '97, 112. 



Integrations, some theorems of, '91, 63. 



Invertin fermentation, '91.30. 



Ionization experiments. '99, 98. 



Iron, autographic method of testing mag- 

 netic qualities of, '93, 269. 



Ischnoptera, '92, 155. 158. 



Ischnoptera bivittata, '92, 162. 



Ischnoptera pennsylvanica, '92, 158. 



Ischnoptera iinicolor, '92. 160. 



Isoetes macrospores, '91, 17. 



Isopyrum biternum. symbiosis of, '93, 254. 



Isosma in Indiana. '98.227. 



Isthmus of Panama, '91, 24. 



Katydid, larger angular-winged, '92, 107. 



Katydid, narrow-winged, '92, 102. 



Katydid, oblong leaf-winged, '92, 104. 



Katydid, oblique-winged. '92,107. 



Katydid, round-winged, '92, 105. 



Katydid, true, '92. 109. 



Katydid, Uhler's, '92, 106. 



Kelanea. '91. 23. 



Kellerman, W. A., '91.74. 



Kellieott, D. S., '91, 168; '95, 242, 251. 



Kendrick. Arthur. '98. 86; '00, 1(39. 



Kentucky fishes, '91, 31. 



Keokuk group. '91, 14. 



Keokuk rocks, dip of, at Bloomington, '94,52. 



Ketols condensation with acetophenone, 



'91,46. 

 Kettle holes, '95, 55. 

 Kindle. Edward M., '92. 72; '93, 156; '94. 49, 



52. 54. 68. 

 Kirtland's warbler, '93. 224. 

 Kizer. E. I.. '98. 222. 



Knipp. Chas. T., '95. 62; '97, 59; '00, 90, 91, 95. 

 Knobstone formation in Indiana, '98, 283. 

 Knobstone groui). '97, 253, 257, 258. 

 Knobstone group, distribution of, etc., '98 



289. 

 Knox County, cypress of, '97, 172. 

 Knox County plants, '91, 29. 



JASPER COUNTY, observations on glacial 



drift, '94, 43. 

 Jefferson County birds. '91, 23. 

 Jefferson County butterflies, "91, 22. 

 Jefterson County cystidians. '91. 23. 

 Jefl'erson County wasps, '91, 23. 

 Jeffersonia diphylla. embryo-sac of, '94, 131. 

 Jenkins. J. N., "94, 66. 

 Johnson County geo. section. "91, 17. 

 Johonnott, E. S., Jr.. '00, 110. 

 Jones. Lee IL. '97, 257. 

 Jones. Walter. '92,166; '94, 52. 

 Jones, W. J.. Jr.. '96. 112. 

 Jordan, D. S.. '91. 21; '93. 71. 

 Juday, Chaneey, '96, 287. 

 Jug rock, '98.268. 

 Juglans nigra. '91. 25. 

 Juneo hyemalis, '91, 164. 



KAKERLAC AMERICANA, '92,157. 

 Kakevlae orientalis. '92,156. 

 Kankakee River, '91. 39. 

 Kankakee salamander, '00, 165. 

 Kankakee Valley. '91.39; '98,277. 

 .Karyokinesis in the embryo-sac, '98, 164. 

 Katydids, '92, 92, 97. 

 Katydid, broad-winged. '92. 109. 

 Katydid, fork-tailed, '92, 101. 



LABES IIYPIILOCYBAE. '92.91. 



Laboratory, a new, '97, 65. 



Laboratory, botanical, working shelves for, 

 '94,61. 



Lagodon. '91. 19. 



Lake Cicott and Jiake Maxinkuckee. notes 

 on flora of, '96, 116. 



Lake Cicott. location and topogrnphv. '96, 

 117. 



Lake County, '96. 73. 



Lake County, extinct fauna of. '94. 54. 



Lake Maxinkuckee. '97, 56; '98, 70. 



Lake .Maxinkuckee, flora of, '00, 124. 



Lake Maxinkuckee, location and topogra- 

 phy, ''M'^. lis. 



Lake Michigan, '96,72. 



Lake Ontario, angling in, '94, 81. 



Lake region of Northeastern Indiana, gen- 

 eral pliysiographic conditions, '96, 149. 



Lake region of Northeastern Indiana, notes 

 on the flora of. '96. 147. 



Lake region of Northeastern Indiana, out- 

 lines of. '96, 147. 



Lake region of Northeastern Indiana, physi- 

 ographic changes, '96, 150. 



Lake region of Northeastern Indiana, some 

 general observations. '96, 157. 



Lamniellibranchiata, '91,68. 



