XX LIST OF ILLUSTRATIONS 



PAGE 



151. 1, 2. Green tomato fruits attacked by Aplanobacter michiganense. From 



a hothouse in Massachusetts in 1915. . 210 



152. Same series as figure 150, showing loss of green color and swelling of 



stems before rupture. (See figure 153 for later stage.) . . 211 



153. Crack on a tomato stem due to Aplanobacter michiganense which was 



inoculated farther down. . . 



154. Green tomato fruit oozing Aplanobacter michiganense as result of a stem 



inoculation . . . 



155. Tomato plant infected with Aplanobacter michiganense through broken 



roots 



156. Stomatal leaf-infection due to Aplanobacter michiganense. . 213 



157. Longitudinal section of a tomato leaf showing bundle disorganization 



due to Aplanobacter michiganense 214 



158. Detail of a leaf-bundle infection in a tomato sprayed with Aplanobacter 



michiganense - 215 



159. Rods of Aplanobacter michiganense highly magnified. . 216 



160. Aplanobacter michiganense induced to grow in acid agar by presence of 



another organism 217 



161 The new Massachusetts potato disease (net-necrosis) by reflected 



light.... 218 



162. Cross-section of stem-end and eye-end of a diseased potato tuber (net- 



necrosis) from Massachusetts 220 



163. Thin section of a third tuber photographed by transmitted light. 221 



164. Raw carrot destroyed by Bacillus carotovorus L. R. Jones. Check-half 



sound 



165. Like right half of figure 164, but after it was accidentally dropped. 226 



166. Separation of cells of carrot due to Bacillus carotovorus 225 



167. .4. Bacillus carotovorus streaked on flabby vs. turgid carrot 3d day; 



B. Ditto, 6th day. In each case one check is omitted 227 



168. Raw potato tuber attacked by Bacillus carotovorus 



169. Potato shoot attacked by Bacillus carotovorus 



170. Green cucumber rotted by Bacillus carotovorus. Check-half sound. . 229 



171. Calla lily rot due (?) to Bacillus carotovorus . . 230 



172. Enlarged cross-section of figure 171 at base 



173. A detail of figure 172 highly magnified, showing bacterial disorganiza- 



tion of the cell-wall 232 



174. Cork layer formed by a potato tuber under a rot spot due to Bacillus 



carotovorus 233 



175. Cross-section of a potato stem attacked by Bacillus carotovorus. . 



176. Flagellate rods of Bacillus carotovorus 234 



177. Agar-poured plate colonies of Bacillus carotovorus (?). Stock culture 3a 



(long in my laboratory) 235 



178. Do. Jones' original stock of Bacillus carotovorus. 3a (received from 



Madison, Wisconsin, in 1920.) 236 



179. Gas from Bacillus carotovorus in potato juice 237 



180. Bacillus carotovorus on gelatin magnified surface colony 24 hours old, 



showing fimbriate margin 239 



]<S1. Bacillus carotovorus on gelatin fimbriate margin of a surface colony 



3 days old liquefied at left 239 



