Subject Index 463 



Raspben-v, 324 



Rat, 42. 37S 



Reco\er\ from colcliiciiie. 379 



in AUium. 29. 9li 



in animals, 56-58, 9(i-98 



in corneal tissues, 97 



in li\er. 44 



in |)lants. 5(). 94-9(i 



])()hploid\ resuitin"^ after, 94-95 



principle of re\ersibilitv, 91-91 



processes of, 81 



reduction in ninnher of nuclei, tl 



in sarcoma, 27 



after single injection, 57 



stages of, in Trilii inn, 95 



stages of, in Tri turns, 43 



transfer to water, 94 

 Rectum, 226 

 Red l)lood cells, 188 



diameter of, 188, 189 



forming tissues, 376 



\oliimes, 381 

 Red clover, tetraploids, 322 

 Regeneration, 93, 236-42: see also 

 Kidnev, Li\er 



in amphil)ians, 376 



for c-mitosis study, 376 



in developing animals, 242—16 



and h\pertroph\ , 236-42 



inhibition of. 245 



of limbs, 242 



li\er of rat. 44, 57, 216 



of nerve, 246 



tail of Xenapus, 242-45 



of thvmus, 241 

 Regenerati\e tissues. 385 

 Renal artery, ligature of, 40, 238 

 Reproductive isolation, 292 

 Resins, 140 

 Resistance, in plants and animals, 398 



bv Colchicuni to colchicine, 107. 398 



of golden hamsters, 107, 398 



to phytohormone tests, 107 

 Respiration, 103 



cellular. 204 



in tumors, 261 

 Respiratory paralysis, 377 

 Retention of colchicine in cell, 383 

 Reticulocytes, 184, 185 

 Reversible effects of colchicine, 89: 



see also Re\ersibilitv 

 Reversibility, 31 



capacity to, 93-91 



characteristic important, 91-91 



demonstrated, 94 



necessary for indudion of poUploidy, 

 92-93 



regeneration of spindle, 94 

 Reversion to diploidy. 285 

 Rheumatism, 1, 2, 3 

 Rhizomes. 381 

 Rhi/otomi, 2, 3 



Rhodeus niuarus, 226, 227 



luiptial colors, 191 

 HI I ()(■() discolor. 109 

 Ribes 



currant and gooseberry combined, 312 



meiotic irregularities carried over, 1 16 



ne^y species, R. nigrolarin, 312 



species of: s^rosstilnria, 312; ?iigruni, 

 312 

 Rii)onucleic acid, 89, 397 

 Ribose, 417 



Ribose nucleic acid, 121 

 Ricine, 206: see also Abrine 



induces stro]>hosomy, 206 

 Ri(iiius. tumors in, 266 

 Ring A, 161 



presence of benzenoid ring, 161 

 Ring B. 161-67; see also Colchicine 

 St rue tine 



recognized as 7-membered, 166 



research on, 161-67 



revision of Windaus concept, 166 

 Ring C, 167, 168, 409 



of colchiceine troj^olonoid, 168 



comparison with tropolones, 168-69 



Dewar's suggestion, 168 



enolone properties deri\ed from, 167 

 Rodents, 376 



Root gatherers: see Rhizotomi 

 Root hairs, 109 



ctinnor. 109 



not polyploid, 109 

 Root systems, treated uiih colchicine. 



384-85 

 Root tip, 369, 386 



Allium, 19, 25, 27. 35, 41, 49, .55, 78, 79, 

 83, 84, 85, 96 



c-pairs in, 49, 85 



c-tumors on, 25. 102-7 



colchicine penetrates. 36 



correlation region of, and c-mitoses, 55 



description of c-mitosis in, 28 



distribution of cells in, 55, 79, 95 



of onion seedlings, 34 



pairs of "skis" in, 51 



polyploidy in, 25. 79. 95 



tests with, 19, 34 



wheat, 90 



X-ray on, 105 

 Root tiimor, 25, 103 

 Roots, encised, 132, 385 

 Rudimentary cell plates, 89, 90 

 Ruuiex acetosa, 132 

 Russia, 286, 287, 296 



Sacrharoinxces cerevisiae, 123 



Saccharose, 116 



.Saffron, 1 



Salaniandra. corneal cells of. 101 



Sali\ar\ srlands, 269 



