327 



it. 185. 



Preponderant factors . . . 261, 263. 



e (Th. S.) 221, 289. 



I'riiiior.luil cells 162, 163. 



group 72, 80, 89, 90, 96. 



(of Huyghens) .... 143. 

 I'rinciple (of symmetry) .... 1,2. 

 1'ringsheim (H.) .... 218, 220. 



Process (of repetition) 2. 



Projection (Gadolin's) 82, 83, 84, 85. 

 Projection (stereographical) . 82, 83. 



Propeller 40. 



Proportio divina 158, 159, 164, 195, 196. 

 Propylamine-stanni-chloride . . . 193. 

 Propyl-isopropyl-cyano-acetic acid 239. 

 Propylamine-stanni-chloride . . .193. 

 Propyl-isopropyl-cyano-acetic acid 239. 



Propyl-piperidine 266. 



Proteids 284, 285. 



Prunier (G.) 252. 



Pseudo-asymmetric carbon-atoms 245, 

 246, 249, 250. 



Pseudo-coprosterol 216. 



Pseudo-cubic space-lattices . . .194. 

 Pseudo-racemism . . . 222 224, 266. 

 Pseudo-racemism (partial) .... 224. 



Pseudo-rhombohedron 177. 



Pseudo-symmetry 119, 170, 171, 182, 



184193, 257, 263. 

 Pseudo-symmetry (elements of). .119. 



Purdie (T.) 206, 213. 



Pyramidal hemihedrism . . . 88, 89. 



Pyrite 72, 170. 



Pyritohedron 86. 



Pyro-electricity 96, 100, 101, 102, 258. 



Pyrophyllite 169. 



Pyruvic acid 282, 294. 



Q. 



Quartz 6, 97, 98, 99, 100, 101, 170, 179, 



181, 189. 



Quaternary axis (of 1st order) 22,79,124. 



Quaternary axis (of 2nd order) 20, 24, 



25, 54, 248, 249. 



Quercine 252. 



Quercite 252. 



Quinary axis 22, 24. 



( Mimic acid. . . . 293. 



ouinic acid (plu-nyl ethyl-amide of) 293. 

 ..Hiimdinr 212, 213, 283, 297, 298. 

 < )m.m,, . 213, 215, 283, 297, 298. 



Quinine-levulinate 291 . 



Quinine-pyruvate 291 . 



Racemates 200, 201, 203, 204, 205, 208, 



209, 211, 212, 222, 260, 261, 279, 



284, 292. 



Racemic acid . . 198, 206, 212, 281. 

 Racemisation . . 224228, 272, 294. 

 Racemism (partial) . . 214, 215, 216. 

 Racemism (pseudo) . . 222224, 266. 

 Raceraoids 200, 201, 203, 204, 205, 



208, 209, 211, 212, 222, 260, 261, 



279, 284, 292. 



Radial arrangement 162. 



Radiation (of X-ray-bulb) . . . .147. 

 Radiolaries 3, 45, 54, 56, 59, 68, 69, 83. 



Raper (H. S.) 285. 



Rapp (R.) 219. 



Raske (K.) 247, 273, 275. 



Rates (of growth) 161. 



Rational cosines .... 78, 79, 145. 

 Rational indices . . 76, 77, 115, 117. 



Rational periods 22, 117. 



Rays (Rontgen-) 77, 97, 98, 99, 101, 



109, 133, 141, 142, 143, 146, 148, 149, 



186, 189, 191. 



Reaction-velocity 280, 281, 282, 283, 



287, 288. 

 Read (J.) . 213, 224, 233, 237, 247. 



Reciprocal relations 104. 



Reflection ... 3, 8, 1 1, 14, 19, 49. 



Reflections (characteristic) . . 14, 15. 



Reflections (repeated) 3, 8, 21, 25, 26, 



27, 28, 29, 30, 31. 



Regularity (geometrical) . 2, 6, 7, 68. 

 Regularity (variable and invariable) 6, 7. 

 Regulation (of velocities) .... 287. 

 Relations (symmetry-) . . . . 20. 



Relative symmetry 96. 



Religious symbols 36. 



Repeat 111, 120, 121, 122, 123, 126, 128. 

 Repetition (regular) ... 2, 3, 4, 85. 



