684 



INDEX 



Proliferation, in Begonia, table of results 

 of wounding leaf blades, 62G 



Pre-soak seed treatment, 71 



Prophylaxis, 68 



Protea, leaf spot of, 66 



Pseudomonas tritici Hutchinson, cause 

 of wheat disease in India, 48 



Ptah-Hotep, precepts of, 653 



Publications, brevity desirable in, 646 

 clearness essential, 644 

 good summary essential, 647 

 place of publication important, 643 



Pyrus ussuriensis Maxim., resistant to 

 "pear blight, 377, 386, 387, 388 



Rand (F. V.), experiments with bac- 

 terial wilt of cucumbers, 30 



Rape, black rot of, 145. (See black rot 

 of crucifers.) 



Rathay's disease of orchard grass, 62, 

 473' 



Razors, for microtome use, 83 



Recovery from disease, 17-19 



Red cabbage, freezing experiment with, 

 566 



Reimer's resistant pear stocks, 386, 387 



Reimer's treatment of pear blight, 71 



Research, ethics of, 648 



Resistance, to disease, in plants, 16, 75 



Rice disease, nature of, in Italy, 66 



Ring rot of potato, 474 



Root-nodules, of legumes, 46, 551 



Roots, infection through, 15, 16, 188, 

 212 

 from crown gall, 421, 458 



Rose galls, how avoided, 73 



Rotation, as a method of control in 

 plant diseases, 74 



Rubber, brown bast disease of, 52, 476 



Russia, bacterial diseases in, 66 



Saint Paul's advice, 658 

 Salamanders, inoculations of, 36 

 Sand-blast, hypertrophies due to, 489, 



507 

 Sandwich Islands, bacterial diseases in, 



64 

 Savastano (Luigi), 2, 400 

 Scientific man's stock in trade, 654 

 Sections, free-hand, 114 



Sections, fugitive stains, 117 



microtome, cutting and care of, 115 

 fixing tissues for, 115 

 keeping record of, 115 

 staining of bacteria in, 116 

 filing of, 120 

 preparation of, 81, 114 

 stains recommended for, 117 

 straightener for, 83 

 technic of making, 115 

 Seed-beds and disease, 73, 159 

 Seeds, treatment of, 69, 71 

 Seedsmen, responsibility for spread of 



disease, 19, 20 

 Seneca, wisdom of, 639 

 Sereh of cane, 52, 476 

 Sharing credits, 657 

 Shriveled seeds and disease, 56, 69 

 Similarity and identity, fallacy of, 640 

 Soft rot of carrot, 223. (See also Bacil- 

 lus carotovorus.) 

 appearance of diseased tissues, 



224 

 description of causal organism, 



230 

 etiology possibly confused, 229, 



230, 232, 235 

 figures illustrating, 224, 225, 227, 



228, 229, 230 

 geographical distribution, 223 

 histology, 226, 231, 232, 233 

 inoculation experiments, 241 

 literature, 252 



method of isolating causal or- 

 ganism, 241 

 other host plants, 225 

 resemblance to calla lily rot, 229 

 resemblance to other soft rots, 



223, 239 

 type of disease, 223 

 Soil, 



and infection, 21, 34 

 method of sterilizing, 86 

 Solanaceae, brown rot of, 177. (See 

 also Bacterium solanacearum.) 

 appearance of disease, 178 

 cause of disease, 182 

 dwarfing due to, 181, 184, 189 

 figures illustrating, 177, 178, 179, 

 180, 181, 182, 183, 185, 186, 187 



