320 



Holohedral forms 72, 80, 170, 260, 262. 



Holohedrism 80, 82, 89, .118, 122, 258, 



259, 260, 262. 



Homogeneity Ill, 123, 194. 



Homogeneous fields of force . 94, 95. 



Homogeneous structures 111. 



Homologous points 17, 111. 



Homopolar axes . 38, 40, 44, 67, 88. 

 Humphries (H. B. P.) .... 278. 



Huyghens (Chr.) 143. 



Hydrazine-derivatives 212. 



Hydrobromic acid 278. 



Hydrochloric acid .... 278, 294. 



Hydrocyanic acid 282. 



Hydrocharis . 59. 



Hydrophyllum virginianum .... 35. 

 Hydroxy-acids .... 225, 275, 278. 

 #-Hydroxy-butyric acid (isobutyl-ether 



of) .275. 



Hydroxy-hydrindamine 213. 



norm. #-Hydroxy-isobutyl-butyrate 275. 



Hydroxyl-group 135. 



Hyoscyamine 226. 



I. 



Icosahedron (symmetry of) . 42, 45. 

 Icositetrahedron (pentagonal). 84, 85. 



Ideal forms 6, 7. 



Identity 10, 79. 



Idocrase 179. 



Imaginary crystal-forms . 53, 54, 67. 

 Imaginary fruits . . . . . . 36, 40. 



Imago (of physical phenomenon) 91, 92, 

 93, 96, 102. 



Immobility (of organs) . . . 55, 154. 

 Inactive molecules .... 244 256. 



Inactivity (optical) 226, 245, 246, 267. 

 Independent action (of mirror-planes) 



30. 



Indices (Miller's) . 77, 84, 85, 137. 

 Indices (rational) . . 76, 77, 115, 117. 

 Infinite figures 16, 17, 18, 21, 28, 110. 



Inflorescence 195, 196. 



Influence (guiding) 277, 287, 288, 289. 

 Influence (sphere of) ... . 136, 137. 

 Inhomogeneous patterns . . 129, 130. 

 Inoculation (of solutions) 206, 207, 210. 



Inorganic salts 266. 



Inosites . 250, 251, 252. 



Instability (of antipodes) .... 296. 



Integer numbers 115. 



Intensities (of spectra) . . 151, 152. 



Interatomic dimensions 142. 



Intercalations 181192, 222224, 257, 



263, 264. 



Interference-maxima. . . . 145, 147, 

 148, 150, 152. 



Interference (of Ron t gen-rays) 144, 

 145, 146, 150. 



Intermediate compounds 276, 282, 289. 

 "Intermediate detachment (of radicals) 



277. 



Intermolecular dimensions . . . .142. 



Internal compensation 245, 246, 249. 



Internal structures (of crystals) 149, 



150, 151, 152. 



Interpenetration (of crystals) 169, 170. 



Interpenetration (of space-lattices) 129, 



130, 150, 152, 153. 



Intersecting axes 18, 28. 



Intersecting planes 26, 27, 28, 29, 30. 

 Inversion 15, 19, 49, 55, 56, 89, 98, 99, 



244, 247. 



Inversion-centre 15, 21, 23, 25, 55, 89, 

 98, 99, 244, 247. 



Inversion (Wai den-) 273, 274, 275, 

 276, 277, 278, 279. 



Invertase 219, 221. 



lonisation-chamber 146. 



Iron-salts (complex) 107. 



Irrational parameters 117, 118, 157, 

 158, 159, 164, 194. 



Irregularities (of structure). . . .101. 

 Isobutyl-dJ-bromo-propionate . . . 226. 

 Isobutyl-methyl-benzyl-phenyl-ammo- 



nium-iodide 228. 



/-Isobutyl-worw.#-oxybutyrate . . 275. 



Isocinnamic acid 255. 



Isodimorphism .... 206, 207, 210. 



Isolactose 220. 



Isomaltose 220. 



Isomerides (number of) 232. 



Isomerides (symmetry of) . . - .195. 



Isomorphism 135, 137, 175. 



Isomorphous mixtures 189. 



