Subject Index 451 



Electronic niicrosc()i)\, si 

 El odea. 132 

 Ely mils, 302 

 Embryo culture, 363 

 Enil)r)o of grasshopper, 55 

 Eini)ryo sac develo])nicnt. 103 



in Carthamiis. 117-19 



effect of colchicine, 118 



embryo sac sterility, 38fi 



enlargement, 1 17 



stages, 118 



in Tradescantia. 117 

 Embryonic extracts, 224 



action on bone marrow. 224 



in animals, 202. 211 



gonads, 202 



malformations in chick, 20()-9 



niegaloblasts, 210 



tool for growth, 209-11 

 Embryonic growth, moditicd h\ 



colchicine, 202-9 

 Euipetrum, species of: hennaphiodituni. 



352; nigrum, 352 

 Emulsions. 383 

 Endocrine glands, mitotic simulalion of, 



232-36 

 Endocrine kidney operation, 238 

 Endocrine tissues of pancreatic gland, 

 177 



assay methods of, 19; see also Groi\ th 



research on. 214-16 

 Endosteinii: see Bone 

 Endothelial cells, mitoses. 246 

 England, 324 

 Enolone system. 161 



enolone-methyl-ether system. 161 



enolone properties. 167 



tautomeric enol s\stem, 160 

 Enzyme reaction, 103 

 Enzyme system, 395 

 Enzymes, 396. 417 

 Ephedra, 74, 92 

 Epiieineron, 6, 11, 264 



of Dioscorides, 1 1 



for tumors, 11, 264 

 Epidermal cell origin from apex. 350 

 Epi-inosose. 417 

 Epidermal mitosis. 379 

 Epidermis for tests, 377 

 Epididymis, 232 

 Epinephrine. 183 

 Epoophoron, 227, 232 

 Equatorial orientation of chromosomes; 



see Chromosomal orientation 

 Errors in experimental procedure, 379 

 Eruca, 346 



Ervatamia aii'^iislilolia. 413 

 Erythroblasia. 186. 188, 224 



erythroblastic cells, 189 



erythroblastosis, ayian, 262 

 Escherichia coli, 121. 122 



filtrates of, 261 



Estradiol, 226, 235 



Estrogens; see Hormones 



Estrus cycle, 220 



Ethanol, 122 



Ether. 401 



Ethyl alcohol, 104, 402 



Ethylairbamate (ethylurethane) , 101 



Ethylcarbylamine, 412, 415 



N-Ethylcolchicamide, 41 1 



Ethyl-colchiceine, 407 



Ethylmercurychloride, 412 



Eucolchicum, 8, 10 



Euglena, 126 



Euphorbia peplus, 413 



Eyulution in wheat, 295. 299 



Aegilops, role of, 296-97 



Agropyron, role of, 295-99 



divergent and convergent, 299 



origin of hexaploid, 295-300 



Triticuin, role of. 295 

 Exocrine tissues, 177 

 Experimental cytology, 385 

 Explantation, 219 

 Exploded c-metaphase, 38-39, 44, 347 



in Allium. 25, 79.85,97 



in Arbacia. 7-1-76 



described, 40-41 



diagram of Triturus, 43 



in neuroblast of grasshopper. 66 



in pollen tidie, 37 



in regenerating li\er, 44, 57, 70 

 Exponential decay curve, 77 



measured by birefringence, 77 

 Extra chromosomal types. 346; see also 



Aneuploids 

 Extra chromosome transmission. 386 

 Extraction methods for colchicine, 

 154-59 



alcoholic, 154-59 



chromatographic differentiation, 151 



petrol ether, 154 



Fall-blooming meado\v saffron, 4 

 Feather gro\\th. action of colchicine on, 



190 

 Feces, after (ohhidne injection. 194 

 Feeding Hills, Massachusetts, 311 

 Female gametophyte, 386 

 Female sterility, 386 

 Fern studies 



germination of prothalli. 119 



pro t hall ia, 119 



sperms, 119 



sporogenous tissue, 119 

 Fertility, 371 



of am|)hipl()ids. 293 



of autoploids, 319-25 



female sterility in watermelon. 371 



meiosis, 371 



percentage pollen, 371 



