681 



Microtomes, Reinhold-Giltay, 82 



Spencer rotary, 83 

 Milton, citation from, 652 

 Modern languages, need of, in patho- 

 logy, 633, 650 

 Modern science, value of, 642 

 Molisch, Hans, forcing dormant buds 



with warm water, 623 

 Molluscs, diseases transmitted by, 33 

 Montaigne, wisdom of, 633, 652 

 Mottling of leaves due to loss of water, 



506, 553 

 Mulberry blight, 340. (See also Bac- 

 terium mori). 

 appearance of diseased plant, 340 

 dead twigs due to, 341 

 description of pathogen, 347 

 distortion of leaves, 340, 342 

 early stages of disease, 340 

 figures illustrating, 341, 342, 343, 



344, 345, 346, 350 

 geographical distribution, 341, 342 

 histology, figures illustrating, 347, 



349, 352, 353 

 history of disease, 343 

 inoculation experiments, 351, 354 

 late stages of disease, 340 

 literature, 358 



method of isolating causal or- 

 ganism, 351 

 resemblance to pear blight, 340 

 susceptible varieties of mulberrj-, 



341 

 tyloses in, 357, 477 

 type of disease, 340 

 Miiller-Thurgau, potato experiments, 



622 

 Museum specimens, 120 

 Mushrooms, bacterial rot of, 66 

 Mustard, black rot of, 145. (See black 

 rot of crucifers.) 



Nectaries, infection through, 16 

 Negatives, 



filing of, 131 



labeling of, 131 

 Nematode galls, 543, 550 

 Nematodes, as agents in transmission 



of diseases, 33, 181 



Nematodes in soils, treatment of, 73, 

 114 



Ngmec, studies of nematode tumors, 

 545, 549 



Net-necrosis of potato, 218-221 



Nigrosin, use of, in staining, 117 



Nitrate reducing organisms, 147, 182, 

 230, 257 



Non-nitrate reducing organisms, 135, 

 161, 205, 285, 306, 347, 367, 396, 421 



Nucleus, division of, in tumor forma- 

 tion, 545 



Nurserymen, responsible for disease, 19, 

 20 



Oak, frondose gall on, 556, 557, 559, 



560, 561, 562, 564, 565 

 Oats, halo-blight of, 55, 474 

 Objectives, Zeiss, 85 

 Observation and reflection, insufficiency 



of, 637 

 Oedema of tomato, 489 



figures illustrating, 508, 509 

 O'Gara (P. J.), disease of western wheat 

 grass, 47, 473 



on fire blight, 365, 371, 381, 384, 386 

 Oleander tubercle, 33, 394 

 Olive knot. (See olive tubercle.) 

 Olive tubercle, 389. (See also Bacte- 

 rium savastanoi.) 

 appearance of diseased tissues, 389 

 bacterial ooze abundant, 389 

 cavities formed in tissues, 389 

 channel of secondary infection, 396 

 etiology, 394 

 figures illustrating, 390, 391, 392, 



393, 395 

 geographical distribution, 66, 391 

 German views, concerning, 395 

 granulomatous nature of, 389 

 histology, figures illustrating, 396, 



397, 398, 399 

 history of the disease, 391 

 in what fields and climates most 



abundant, 410 

 literature, 411 



method for control of, 74, 410, 411 

 method of isolating causal organ- 

 ism, 404 



