326 



Phillipsite 176, 182. 



Phlogopite 169. 



Phosphorus-atom (asymmetric) . . 233. 

 Phosphorus-pen tabromide . 275, 278. 

 Phosphorus-pentachloride . 275, 278. 



Phosphorus-tribromide 274. 



Photographical method 146. 



Photochemical reactions . . 300, 303. 

 Photochemistry. ....... 300, 303. 



Phyllotaxis 35, 108, 109, 110, 155, 156, 



157, 158, 159, 160, 161, 162, 163, 



164, 165. 



Physical phenomena 22, 46, 87, 88, 89, 

 90, 91, 93, 97, 101, 198. 



Physical symmetry . 91. 



Physiological action (of antipodes) 



218, 219. 



Physiological processes 218, 219, 287, 

 288, 296, 299. 



Pickard (R. H.) 278. 



Piezo-electricity 101, 102. 



Pinene ' 284. 



Pinus . . 156, 161. 



Piles (of crossed lamellae) . . . .181. 



/3-Pipecoline-bitartrate 216. 



Piperidonium-derivatives .... 267. 



Pisano (L.) . 157. 



Piutti (A.) 206, 218. 



Plane (of symmetry) 4, 5, 25, 56, 63, 

 65, 66, 70, 71. 



Plane (of gliding symmetry) . . . 140. 

 Plane (of indirect symmetry) . . 244. 

 Plants (phyllotaxis in). . . 155160. 



Platinum-anticathode 147. 



Platinum -metals 140. 



Plato 1,7. 



Platonic polyhedra 42. 



Platycodon grandiflorus 60. 



Plotinos 2. 



Plurivalent atoms 231, 232, 233, 234, 

 235, 260, 261, 268- 



Podalyria cor data 54. 



Pohl (R.) 142. 



Point-system 112. 



Polar forms 41, 42, 87. 



Polarisation (dielectric) .. . . 96, 97. 



Polarised light 92, 93. 



Pole (of projection) 82, 83. 



Polemonium coeruleum 35. 



Pollen-cells. ... 45, 46, 68, 72, 73. 



Polyclinum constellatum 59. 



Polygoneae 73. 



Polygonum amphibium 46. 



Polyhedra 16, 17, 25, 39, 41, 53, 

 62, 67, 86. 



Polymorphism . . . . 183, 184, 193. 



Polypeptides 218, 220, 275. 



Polysymmetrical changes . 191, 192. 



Polysymmetry . . . . 191, 192, 193. 



Polysynthetic twins 171. 



Pope (W. J.) 109, 136, 137, 141, 206, 

 208, 212, 213, 216, 222, 223, 224, 226, 

 230, 232, 233, 237, 241, 247, 254, 262, 

 263, 281, 286, 290. 



Poplar-leaf 6, 7. 



Parties fur cat a 59, 64. 



Position-isomerides 135. 



Positions (change of) 12, 13, 14, 15, 

 16, 18, 19. 



Positions (parallel) 14, 194. 



Possible axes 78. 



Possible crystal-edges 78. 



Possible facets 78. 



Possible symmetries . . 11, 15, 25. 



Potassium 149, 150, 151. 



Potassium-bichromate 35. 



Potassium-chloride . . 149, 150, 151. 



Potassium-chromi-oxalates . 214, 225. 



Potassium-cyanide 282. 



Potassium-dithionate . . . 179, 181. 



Potassium-ferro-cyanide 179, 184, 185, 



189, 190. 



Potassium-hydroxide 274, 275, 289, 294. 



Potassium-permanganate .... 295. 



Potassium-rhodium-oxalates 209, 210, 

 214, 261, 262, 264. 



Potassium-sodium-chromate . . . 192. 



Potassium-sodium-racemate . . . 202. 



Potassium-sulphate . . 173, 174, 193. 



Potassium-tartrate 207. 



Potassium-tetrathionate ... 53, 54. 



Pottevin (H.) 220. 



Poulsson (E.) 218. 



Precipitation (from solutions) 208, 209, 



210. 



Pre-existing dissymmetry 287, 294, 295. 



