XXll LIST OF ILLUSTRATIONS 



Page 



213. Portion of an immature bean leaflet showing an earl}' stage of infection 



with Bacterium phaseoli EFS 280 



214. Pure-culture spray inoculation of Bacterium phaseoli on an immature 



bean leaflet 281 



215. Bean leaflet attacked by Bacterium phaseoli. From a garden in Wash- 



ington, 1908 , 282 



216. Spots on a bean leaflet due to a pure culture stomatal infection of 1914. 



Chlorophyll persisting around the spots 283 



217. Distortions of bean leaves due to infection of the young veins by Bac- 



terium phaseoli 284 



218. Portion of a bean pod enlarged to show earliest visible stage of stomatal 



infection. 8th day 285 



219. Pure culture pod inoculation of bean blight {Bacterium phaseoli). A 



single spot enlarged 286 



220. Bean pod sprayed 14 days with Bacterium phaseoli and showing spots. 



1914. Natural size 287 



221. Base of bean pod attacked by Bacterium phaseoli. From Idaho, 1914. . 288 



222. Same series as figure 218, but some days later 288 



223. Cross-section of a sprayed bean leaf prior to collapse — a stomatal 



infection 289 



224. A portion of figure 223 more highly magnified — two stomata visible. . . . 290 



225. Cross-section of a sprayed bean pod (stomatal infection) showing epi- 



dermis pushed up by the bacteria 291 



226. Cavities in outer tissues of a bean pod due to Bacterium phaseoli. Xeedle- 



prick infection of 1897 292 



227. Flagellate rods of Bacterium phaseoli 294 



228. Effect of sunlight on Bacterium phaseoli 295 



229. Buried and surface agar colonies of Bacterium phaseoli 296 



230. Agar poured plate colonies of Bacterium phaseoli showing internal 



markings by direct transmitted light — surface smooth 298 



230". Agar poured plate of Bact. phaseoli showing ringed colonies 299 



231. Cauliflower leaves spotted by Bacterium 7naculicolum McCulloch 301 



232. Cauliflower heads attacked by Bacterium maculicolum 302 



233. Agar poured plate of Bacterium maculicolum from a Sanford, Florida, 



cauliflower 303 



234. Cross-section of an inoculated infected cauliflower head 305 



235. Leaf spot of New York cauliflower 307 



236. Surface and buried colonies of Bacterium maculicolum. from the New 



York cauliflower (figure 235) 309 



237. Flagellate rods of Bacterium mactilicolum 313 



238. A natural infection of Bacterium malvacearum EFS on cotton leaves. 



From South Carolina, 1903 314 



239. Bacterium malvacearum on cotton — a natural infection of leaves and 



bracts. From Arizona, 1914 315 



240. Inoculated cotton leaves. Stomatal infections. Veins diseased. Bac- 



teria smeared on. Early stage. 1915 316 



241. Results obtained in 1915 by inoculating cotton leaves in various ways 



with pure cultures of Bacterium malvacearum 318 



242. Inoculated cotton leaves. Stomatal infection due to Bacterium mal- 



vacearum. Time, 6 weeks. Bacterial suspension sjirayed on. 1915. 319 



