450 Subject Index 



Datura (continued) 



seedlings, 20 



standard line 1, 345 



stramonium. 356 



tetiaploid deficient types, 345 

 Day lilies, 326 

 Deamination, 397 

 Deaminocolchinic anhydride, 166 

 Deaminocolchiiiol methyl ether, 162, 

 163, 170 



iodo form, 164 

 Deformed spindle, 27, 79, 80, 84; see also 

 Achromatic sphere 



hyaline globule, 79, 80, 81 



pseudosjjindle, 79, 84. 193, 394 

 Dehydroandrosterone, 235 

 Demecolcin, 143, 146, 268 

 Demethoxylate deaminocolchinol methyl 



ether, 164 

 Demjano^v -type, 170 

 Denmark, 322, 352 

 Dephosphorylation, 397 

 Dermatogen, 348 

 Desacetylcolchiceine, 404 

 Desacetylcolchicine, 408 



acetylation of, 171 

 Desacetyl-N-methyl-colchicine, 143; see 



also Substance F 

 Desh\clrogcnase, 397 

 Desmethylcokhicine, 373, 405 



in U. S. P. colchicine, 141, 373 

 Desoxyribonuclease, 397 

 Desoxyribonucleotides, 397 

 Desoxyribose nucleic acid, 121 

 Di-aldehyde, 1()2 

 Diaporthe perniciasa. 123 

 Diarrhea from colchicine, 178, 179 

 Diazomethane, 171 

 Di-benzoylation of trimetlnlcolchicinic 



acid, 16() 

 Dicotyledons, 363 

 Diestrus, 231 



Diethyldithiocarbamate, 412 

 Differentiation processes, 103, 125-31 



microbiological material, 103 



modified by colchicine, 103 



in plants, 103, 127-30 



in unicellulars, 103 

 Dihydride, 166 



Dihydro-2-met by 1 naphthalene, 166 

 DiliUe mineral acids, 159 

 Dimercaplopropanol, 411, 412, 413 

 Dimethylarsinate, 411 

 Dinitrodiphenic acid, 163 

 Dioecious races, 352 



diploid, 352 

 Dioscorides, 4, 5, 7 



lK)tanical studies, 4, 7 

 Diox) phenylalanine-decarboxylase, 397 

 Dipcadi, 68, 84 



prophase arrangement of chromo- 

 somes, 35 



Diploid. 382 

 Diploid hybrid, 278 



daughter nuclei, 93 



diploid interspecific, 293 



roots, 332 

 Diploidized type of polyploid, 282 

 Disappearance of spindle bire- 

 frigence, 75 



rate of disappearance correlated with 

 concentration, 76 

 Discoglossus pictus orth., 210 

 Displacement of chromosomes, 90 

 Distorted star metaphase, 38, 39, 83 

 Distributed c-metaphase, 347; see also 



Distriljuted c-mitoses 

 Distributed c-mitoses, 42-46 

 Diurnal variations, 220 



mitotic rate, 375 

 Dog 



first c-mitoses observed by Pernice, 18 



leucocytes in, 187 

 Dominici, 19 

 Dried flowers. 2, 3. 7 

 Drosera, 333 

 Drosophila, 346, 352 

 Drug evaluation 



assay methotis, 141 



biological. 141 



of crude drug, 151, 153 



microchemical, 141 



microscopic, 141 



organoleptic, 141 



physicochemical, 141 

 Drug traffic, 3, 6 

 Drugs, 326 



anabasine of Nicotiana, 326 

 Dryopteris, species of: felix-mas, 119; 



subpubescens, 1 19 

 Duodenum, 376 

 Duration of c-mitosis, 379 



in animals, 48-50, 379 



compared with mitosis, 91-94 



delay in neuroblasts, 46 



intactness period, 46 



in pollen tubes, 47-48 

 Duration of interphase, 380 

 Dwarf wheat, 357 

 Dysploidy, 277 



combined with ampiiiploidy, 309-10 



in Cruciferae, 309 



Ear of mouse, 376, 377 



Ear-clip technique, 378 



Ebers Papyrus, 1, 3, 196 



Ecological characters and polyploids, 370 



disease resistance, 370 



range, 292 



requirements, 319 



seed production, 370 

 Ehrliarta erecta, 301-2 



successful autoploid, 301 



