LIST OF ILLUSTRATIONS XXVll 



Page 



345. A detail from figure 344 B 454 



346. Like figure 345 but from another part of the same locule and further 



enlarged. Normal tissue at right. Disoriented tumor cells at left. 455 



347. Inoculated crown-gall teratoma on sugar beet 456 



348. Inoculated crown gall on top of garden balsam showing roots developing 



from the tumors (hairy root) 458 



349. Flagellate rods of Bacterium tumefacicns. Organism from hop 459 



350. a, h. Y-shaped bodies of Bacterium lumejaciens from a culture treated 



with acetic acid 460 



35L Agar surface and buried colonies of Baderium tumefaciens isolated from 



the Rose (colony P) 461 



352. Agar surface and buried colonies of Bacterium tumefaciens isolated 



from the Hop 462 



353. Inoculated crown gall of Paris daisy showing structure of the tumor 



(spindle cells) 464 



354. Sti'ucture of tumor tissue in crown gall on Paris daisy. Another part 



of figure 353 (round tumor cells) 465 



355. Margin of inoculated crown gall in sunflower pith showing both crushing 



and invasion. Cells of tumor tissue disoriented 467 



356. Crown gall in gland of inoculated Ricinus commuuis. Epidermis 



involved and dividing 470 



357. Chestnut wood injected with lithium carbonate showing ingrowths 



(tyloses) in vessels 478 



358. 359. Cross-section and longitudinal section of tyloses in vessels of 



chestnut wood. Enlarged 479, 480 



360. Chestnut bark showing islands of wood (at 6) due to injection of lithium 



carbonate — a general view 481 



361, 362. Island of wood in chestnut bark. Enlarged 482, 484 



363. Cabbage pith showing effect of injecting sodium bicarbonate 485 



364 Tumors in Ricinus stem produced by vapor of monobasic ammonium 



phosphate 486 



365. Tumors on cauliflower leaf produced by dilute vapor of ammonia 



water 487 



366. Acetic acid tumors on under surface of a cauliflower leaf. 1916 488 



367. Same as figure 366 but produced in 1918 490 



368. 369, 370, 371. Cross-sections of three acetic acid cauliflower tumors at 



different levels 491, 492, 493, 494 



372. Longitudinal section of an acetic acid cauliflower tumor 495 



373. 1-3. Formaldehyde tumors on cauliflower. 4. Section of the same 497 



374. 375, 376. Formic acid tumors on cauliflower leaves 498, 499, 500 



377. Structure of formic acid tumors on cauliflower leaves 501 



378. Photographs showing slight sub-epidermal injury preceding acetic acid 



tumors on cauliflower 503 



379. Harvey's frost tumors on a cabbage leaf 504 



380. 1, 2. Structure of Harvey's frost tumors on cabbage leaves 505 



381. Mottling of cauliflower leaf after exposure to vapor of ammonia water — 



it precedes tumor formation 506 



382. A, B. Wolf's sand blast intumescences on cabbage leaves 507 



383. Cross-section of Vermont tomato leaf showing oedema 508 



