339 



Nucleus (of crystallisation) .2 1 2 , 2 1 3, 2 1 6 . 

 Number (of stereoisomerides) . . 256. 

 Number (of symmetrical operations) 45, 

 52, 82, 92. 

 Numerical data (statistic) . . . .111. 



0. 



Oak-leaf 7, 8, 56. 



Octahedron 43, 87. 88. 



/-Octyl-alcohol 306. 



/-Octylrf-tartrate . 306. 



Olie Jr. (J.) 147. 



Olivier (S. C. J.) 203. 



Olivine 68. 



Onesidedness (of nature) . . 37, 300. 



Ontogenetic explanations . . 165,166. 



Open-chain derivatives 261. 



Operations (symmetry-) 14, 15, 16, 22. 



24, 33. 



Optical activity 186, 187, 204, 205, 243, 



245, 246. 



Optical anomalies 178, 182, 184, 185, 

 186, 187, 188199. 



Optical antipodes (affinity of) 294, 295, 



297. 



Optical antipodes (crystalforms of) 204, 



205. 



Optical antipodes (properties of) 204, 

 205, 211, 217, 225. 



Optical antipodes (stability) 223, 224, 

 225, 226, 227, 232, 233, 234, 235, 236. 



Orchidaceae 55, 201. 



Order (1st) 13, 14,20. 



Order (2nd) 15,20. 



Organisms (living) 3, 35, 45, 54, 56, 

 57, 70, 71, 160170, 205, 222,223, 

 224, 225, 226, 228, 293, 299, 301, 

 302, 303, 304, 311, 312, 315, 319. 



Organs (disposition of) . . 160 170. 



Origin (of active matter) 305, 315321. 



Orophocrinus stelliformis ... 62, 65. 



Orpiment 174. 



Orthogonal intersections. . . 167, 168. 



Orthorhombic symmetry .... 69. 



Orthostichies . . .160, 163, 166, 169. 



Oscillatory electric field . . . .319. 



Ostromisslensky(I.)213, 214, 215,230. 



Ostwald (W.) 111,320. 



Oxalo-diethylenediamine-chromi- 

 bromide 215, 251. 



Oxalo-diethylenediamine-cobalti- 

 bromide 214,215,251. 



Oxides (crystalforms of) 144. 



4 Oximino-cyclohexane carboxylic acid 



265. 



Oxymethylenecamphor 219. 



o-Oxyphenyl-ethylcarbinol .... 307. 



Owen (E. A.) 147. 



Owen Jones . 5. 



P. 



Packing (most closely) 139, 140, 141, 

 142, 143, 144. 



Palladium-anticathode 151. 



Pape (C.) 186. 



Paphiopedilum Hookerae. . . . 55, 56. 



Papilhonaceae 55, 56. 



Parallelohedron 134. 



Parallelepiped cells. . .116,117,118. 



Parallel reflecting planes . . .22, 28. 



Parallel symmetry-axes 119, 127,128. 



Parameter 78, 83, 144. 



Parameters (irrational) 119, 120, 163, 



164, 165. 



Parameters (of crystals) . . 78, 83, 144. 



Parastichies 160, 161, 163, 164, 166, 169. 



Pari (G. A.) 225. 



Paris quadvifolia 35, 36. 



Partial pseudoracemism 232. 



Partial racemism . 204, 221 , 222, 231 . 



Paschke (F.) 236. 



Passiflora augusti folia 70. 



Pasteur (L.) 82, 108, 204, 205,206, 

 206, 207, 213, 217, 219, 223, 225, 226, 

 228, 231 , 237, 240, 243, 244, 269, 270, 

 271, 272, 277, 282, 283, 284, 298, 

 300, 301, 303, 304,308. 



Patterns (finite) 3. 



Patterns (infinite) 112, 113, 123, 124, 

 129, 130, 131, 132, 133, 135. 



Patterns (Rontgen-) 100, 103, 104, 144, 

 146, 180, 191, 192196. 



Patterson (Th. S.) . . 206, 286, 307. 



Paul (D. M.) 315. 



Peachy (S. J.) 218, 219, 222, 241, 242, 



274. 



Pearson (K.) 301. 



Pelagia perla 61. 



Pelorium 201,202. 



Pendulum (elliptic) 3. 



Penetration (of crystals) . .174, 176. 



Penicillium glaucum .... 223, 228. 



Pennine . .190. 



