315 



.;hton (II. J. M.) 295. 



i Hill (A.) 220. 



21. 



59. 



.1 > lass 30, 72, 80, 81, 84, 97. 



.Illation .... 167, 168, 182. 



dilution (fractional) . . . .211. 



Crystallisation (spontaneous) 199, 201, 



202, 203, 205, 208, 209, 210, 266, 284. 



Crystallites 167. 



Crystal lo^raphical symmetry 54, 55, 



134, 135. 



Crystallography 22, 35, 82, 86, 101, 



115, 151. 



Crystal-molecules 132, 153, 154, 194, 



256, 264. 



Crystals 3, 34, 36, 44, 46, 53, 54, 55, 

 56, 60, 62, 63, 72, 97. 



Crystals (fluid) 168. 



Crystals (pseudo-symmetrical) 172, 173, 

 174182, 183. 



Crystal-structure . . . 115, 129, 133. 

 Crystal-system .... 72, 80, 81 , 82. 

 Cube . . 9, 10, 13, 42, 85, 86, 148. 



Cube-group 42, 43, 44, 45. 



Cubic space-lattices 119, 148, 149, 150, 



151. 



Cubic symmetry 81, 84, 119, 138, 139. 

 Cubic system 81, 84, 119, 138, 139. 



Cucurbit a pepo 60. 



Cupri-alkali-tartrates 303. 



Cuprite 44. 



Curie (P.) .... 74, 90, 93, 104. . 



Curtiss (R. S.) 206. 



Curviserial orthostichies 161. 



Cyanea aurelia 59. 



Cyanhydrine-reaction 287. 



Cyathina cylindnca 61. 



Cycle (of atoms) 246. 



Cycle (of changes) 274. 



Cycle (of leaves) 155. 



Cyclic compounds . 236, 246254. 

 Cyclic groups ( 1 st order) 34, 35, 36, 73, 87. 

 Cyclic groups (2nd order) 48, 49, 50, 

 53, 54, 70, 73, 87. 

 Cyclopea genistoides 54. 



Dakin (H. D.) 



Dalhousiea bracttata 54. 



Daphne Mesertum . . 60. 



Darwin (C. G.) 147. 



Data (independent) 81 . 



Dawson (H. M.) 203. 



Day (N. H.) 4. 



Debije (P.) 109, 143, 146, 152, 277. 

 Decorative art (symmetry in) 2, 3, 4, 5,6. 

 Deduction (of possible symmetries) 30, 



51, 52, 56, 63, 65, 70, 71, 73, 79. 

 Deduction (of space-lattices) 118, 119. 

 Definition (of symmetrical figures) 10, 



14. 



Deformation (of crystals) . . . .102. 

 Degree (of dissymmetry) 97, 106, 193. 

 Degree (of symmetry) 120, 121, 122. 



Delphinium peregrinum 195. 



Deltoid-dodecahedron .... 46, 86. 



Dendrites 167. 



Density (surface-) 115. 



Dependency (of causes and effects) 92, 



93, 102. 



Dependency (of symmetry-properties) 



11. 



Descloizeaux (A.). . 185, 187, 257. 



Description (mathematical) 1, 20, 31, 



38, 104, 132, 133. 



Description (mechanical) 1, 2, 160. 

 Description (morphological) 3, 34, 35, 



40, 45, 46, 54, 55, 58, 59, 60, 61, 62, 



64, 67, 68, 69, 72, 83. 



Descriptive parameters 140. 



Detachment (intermediate) . . . 277. 



Deventer (Ch. van) 201. 



Dextrose 208, 281. 



Diacetyl-phenol-phtaleine .... 181. 

 Diagrams (blossom-) 34, 35, 59, 60, 61. 

 Diamond (structure of) 152, 154, 179. 



Dianthus Cartusianorum 46. 



Diatomeae 3, 64, 67, 68. 



Dibenzoyl-glycerinic acid 290. 



Dibromo-amyl-cinnamate .... 291 . 

 Dibromo-menthyl-cinnamate . . .291. 

 Dibromo-1 -methyl -cvclohexylidene-4- 



acetic acid 254. 



