329 



Construction (Ruler's) . . . 29, 127. 

 Continuous medium . . . . 145, 146. 

 Contrast (chemical) 243, 244, 251, 274, 



282, 233. 



Cook (Th. A.) 170. 



Cooper (H. C.) 295. 



Cooperation (of physical causes) 96, 105, 



106, 107, 108, 109. 



Coordinate-axes . 78, 80, 82, 83, 94. 



Coordination . 159, 250, 279, 280, 281. 



Copper 144. 



Coppersulphate 55. 



Copper tartrates . . . . . 317, 318. 



Coralla 55, 63, 65. 



Corals 3, 55, 63, 65. 



Corrosion-figures . . . 271, 272, 273. 

 Covydalis sempevviYens . . . 47, 74. 



Cotton (A.) 304, 318, 320. 



Creighton (H. J. M.) 311. 



Croft Hill (A.) 228. 



Crossing axes 22. 



Cruciferae 60. 



Crum Brown (A.) 321, 



Crystalclass 31, 74, 81, 82, 83, 86, 100. 



Crystallisation 172, 173. 



Crystallisation (fractional) . . . .217. 



Crystallisation (spontaneous) 207, 208, 



209, 211, 214, 215, 216, 298. 



Crystallites 172. 



Crystallographical symmetry 56, 137. 



138, 139, 140, 141, 144. 



Crystallography 23, 36, 82, 83, 84, 86, 



87, 88, 101, 102, 104, 105, 138, 139, 



141, 144. 



Crystalmolecules ... 135, 136, 159, 



Crystals 3, 35, 37, 45, 47, 54, 55, 59. 



64, 68, 69, 71, 73, 74. 



Crystals (fluid) 173,174. 



Crystals (pseudo-symmetrical) 177 183, 



197200. 



Crystalstructure 1 18, 120, 121, 130, 131, 

 132, 135, 138, 139, 140, 144. 



Crystalsystem 82, 83, 84. 



Cube 11, 14, 15, 43, 87, 88, 153, 155, 



156. 



Cube-group 43, 44, 45, 46. 



Cubic space-lattices 121, 153, 155, 156, 

 157, 158, 167. 



Cubic symmetry 84, 86, 87, 88, 122, 



141, 142, 144, 167. 



Cubic system 84, 86, 122, 141, 142, 144. 



Cucurbita pepo 62. 



Cupri-alkali-tartrates 320. 



Cuprite . . 45, 



Curie (P.) 75,93,96,99,108. 



Curtiss (R. S.) 212. 



Curviserial orthostichies 166. 



Cyanea aurelia 61. 



Cyanobromide 203. 



Cyanochloride 203. 



Cyanohydrine-reaction. . . 302, 307. 



Cyanuric acid 203. 



Cyathina cylindrica 63. 



Cycle (of atoms) 256. 



Cycle (of changes) 288. 



Cycle (of leaves) 160, 161. 



Cyclic compound. . . . 245, 256 264. 

 Cyclic groups (1st order) 35, 36, 37, 74, 



90, 91. 



Cyclic groups (2nd order) 49, 50, 51, 

 5263, 90, 91. 



Cyclopea genistoides 55. 



tfmws-Cyclopentanediol 257. 



D. 



Dakin (H. D.) 227, 311. 



Dalhousiea bracteata 55. 



Daphne Mezereum 61 . 



Darwin (C. G.) 151. 



Data (independent) .83. 



Dawson (H. M.) 209. 



Day (N. H.) 4. 



Debije (P.) 101, 112, 146, 147, 150, 



157, 291. 



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



Deduction (of possible symmetries) 32, 

 52, 53, 54, 57, 58, 59, 66, 67, 68, 

 72, 73, 75, 76, 81, 83, 85-92. 



Deduction (of space-lattices) 120, 121. 



Definition (of symmetrical figures) 11,16. 



Deformation (of crystals) . . . .105. 



Degree (of dissymmetry) 99, 108, 206. 



Degree (of symmetry) 122, 123, 124, 125. 



Delphinium peregrtnum 201. 



Delsman (H. C.) 36. 



Deltoid-dodecahedron 47, 88. 



Democritos 2. 



Dendrites 173. 



Density (surface-) 118. 



Dependency (of causes and effects) 



94, 95, 105, 106. 



Dependency (of symmetry-pro- 

 perties) 12. 



Descloizeaux (A.). . 190, 192, 271. 



Description (mathematical) 1,21,32, 137. 



