330 



Description (mechanical) . . . .1,2. 

 Description (morphological) 3, 35, 36, 



41, 47, 55, 56, 60, 61, 62, 63, 69, 70, 



71, 74, 85, 86. 



Descriptive parameters 144. 



Detachement (intermediate) 233, 236, 



291, 292. 



Deventer (Ch. van) 207. 



Dextrose . . . .214,296. 



Diacetylphenolphtaieine . . . .186. 

 Diagrams (blossom-) 35, 36, 61, 62, 63. 

 Diamond (structureof) 156, 157, 159, 184. 

 Diamyl-acetale (of o-nitro-benzalde- 



hyde). 318. 



Dianthus Cartusianorum 47. 



Diatomeae . . 3, 65, 69. 



Diazocompounds (mixed) .... 203. 

 Dibenzoylglycerinic acid .... 305. 

 Dibromo-amylcinnamate .... 306. 



Dibromocinnamic acid 267. 



Dibromomenthylcinnamate . . . 306. 

 Dibromo- 1 -methylcyclohexylidene- 



4-acetic acid . . 265. 



Dichlorodimethylpropionic acid. .318. 

 Dichloro-dimethyl-succinic acid. .318. 

 Dickinson (R. G.) . . . . . 147. 



Dicotyledons 36, 169. 



Didodecahedron . . . . . . . 86, 87. 



Dielectric polarisation. . . 98,99,105. 

 Diethylamine-platinichloride . . . 199. 

 Diethylamine-stannichloride . . .199. 

 Diffraction (of Rontgen-rays) 79, 100, 



145, 146, 147, 148, 149, 150, 152, 



153, 154, 155, 156, 157. 

 Diffractionphenomena 79, 100, 144, 

 145157, 196. 

 Diffractiontheory 144, 145, 146157. 



Diffusion velocity 295. 



Digitalis puvpurea . .201. 



Dihedrongroups (1st order) 39, 40, 41, 

 74, 75, 89, 90, 91. 



Dihedrongroups (2nd order) 64, 66, 



67, 68, 69, 90, 91, 92. 



Dihedron .......... 40. 



^-j--Diketo-j> <5-dimethylpipefazine. 257. 

 j>-j--Diketo-.?-6-dimethylpiperazine. 258. 

 Diketopiperazines. . . . 254, 257. 258. 



Dimensions (intermolecular) 145, 155, 



156. 

 Dimethylbromosuccinate. .... 234. 



<2-j"-Dimethylcyclopentane-l -car- 



boxylic acids 261. 



Dimethyldichloropropionic acid .318. 



Dimethyldichlorosuccinic acid . .318. 



Dimethyldioxyglutaric acid . . . 209. 



< 2-j'-Dimethyl-/-4-diketopiperazine 257 . 



.2-<5-Dimethyl-j>-j--diketopiperazine 258. 

 j j>-<5-Dimethyl-^-j-diketopiperazine 257. 



Dimethyl-ethylene 202. 



^-j--Dimethyl-diketopiperazine 257, 258. 



^-<5-Dimethyl-diketopiperazine 257, 258. 



Dimethyl-hexahydro-phtalate . . 226. 



a-a'-Dimethylsuccinic acid .... 220. 



Dimorphism . . .188, 197, 230, 280. 



Dinitro-diethylenediamine-cobalti- 

 chloride 214. 



Dinitro-tribromo-toluenes .... 139. 



Dioptase 54. 



Dipentene-tetrabromide 221. 



Diploid . . 87, 88. 



Directional affinities 235. 



Directional influence (of atoms) 284, 

 298, 303, 309. 



Directional influence (of crystal- 

 nucleus) 216. 



Discomedusae 55,61. 



Discontinuous medium . . . 145, 146. 



Dispersion (rotation-) 249, 250, 275, 276. 



Disposition (of leaves) 160, 163, 164 



170. 



Dissymmetry 108, 109, 206, 237, 240, 

 243, 244, 247, 250, 253, 269, 276, 

 277, 282, 284, 297, 300, 301, 302, 

 309, 310, 311, 318, 



Dissymmetry (functional) .... 57. 



Distance (of net-planes) 118, 149, 150, 



155, 156. 



Distortion (of molecules) 240, 243,292, 



293. 



Distribution (of points) 117, 118, 120. 



Divergency (in phyllotaxis) 161, 162, 

 164, 166, 168, 170. 



Divina proportio ... 163, 201, 202. 



Doctrine( of symmetry). . . 2, 22, 28. 



Dodecahedron (pentagonal) . . 43, 44. 



Dodecahedron (rhombic) . . .87, 88. 



Dodecamine-hexol-tetracobaltibromide. 



264. 



Domain (fundamental) 134, 135, 136. 



Double bonds 245, 264, 265, 266, 268, 



269. 



Double-salts . . . 208, 210, 211, 231. 



Drew (H. D. K.) 293. 



Drouginine (G.) 317. 



Drymonema victoria 61, 65. 



Dualism (in symmetry-definition) 11,12. 



