VIII LIST OF ILLUSTRATIONS. 



FIG. PAGE. 



97. Tomato Plant No. 64 (1904), 3 Days after Introducing Bad, solanacearum into the Stem by means 



of a few Needle-pricks (control on left) 189 



98. Cross-section of Stem of Tomato No. 26 (1895), showing Bacterial Cavities and Incipient Roots. 190 



99. A Detail from one of the Cavities in fig. 98 1 90 



100. Longitudinal Section of Stem of Inoculated Potato No. 5 (1896), showing Bad. solanacearum 



Restricted to a Single Vessel 191 



101. A Detail from the Same Stem as fig. 86 192 



102. Cross-section of Stem from Potato No. 5 (1896), 10 Days after Inoculation 193 



103. A Detail from fig. 102 194 



104. A Detail from fig. 82 of Inoculated Plant No. 14 (1896), showing Starch-grains Undestroyed by the 



Bacteria in which they lie Embedded 195 



105. The same as fig. 104, but by Polarized Light 1 96 



106. A Detail from fig. 83 at x, showing Starch Undestroyed in Cells Occupied by Bad. solanacearum. . 196 

 107, 108. Details from fig. 83 at A and B, showing Nature of the Tissues, varying Extent of Infection, and 



Absence of Starch in the Vicinity of the Bacteria 1 97 



109. (a), (6), (c) Flagellate Rods of Bad. solanacearum Stained by Different Methods; (d) Non-flagellatc 



Rods of Bad. solanacearum Stained with Silver Nitrate 198 



1 10. Figure Designed to Show Translucency of an Old Culture of Bad. solanacearum ih Milk 199 



in. Gelatin Stabs of Bad. solanacearum 1 99 



112. Agar-poured-plate of Bad. solanacearum (South Carolina) 200 



1 13. Agar-poured-plate of Bad. solanacearum (Porto Rico) 201 



1 14. Australian Sore Eye or Spewey Eye of Potato 208 



1140. Margin of a hanging drop showing Bacillus solanincola 215 



1 146, c. Sesamum plants showing Malkoff's disease (after Malkoff) 217 



I i$d. Bacteria from Malkoff's disease of Sesamum (after Malkoff) 217 



me Histology of Sesamum petiole attacked by bacteria 217 



U4/. Bacteria from Austrian disease of sesamum 217 



1 15. Tomatoes following Tobacco in a North Carolina Field and Subject equally to the Granvillc Wilt. 221 



116. Cross-section of Petiole of a Tobacco-plant Attacked by the Granville Wilt (North Carolina) 228 



117. A Detail from fig. 116 228 



1 18. Bacterially Infected Tobacco-stem Attacked by Fusarium in Hot-house, 5 months after Inoculation 229 



119. Granville Tobacco Wilt: Leaf showing Dead Apex and Brown Veins in the part not dead 230 



120. Cross-sections of Base of Petiole of Inoculated Tobacco Plant No. 34 (1905) 231 



121. Midrib of Inoculated Tobacco Sliced Longitudinally to show Vascular Stain Due to Bacteria. ... 231 



122. Agar-plate from Interior of Plant 31, showing the Presence of a Secondary Soft-rot Organism 231 



123. Aerial Roots on Tobacco Induced by Inoculating with North Carolina Tobacco-wilt Bacterium . . . 232 



124. Crystal from an Old Culture of North Carolina Tobacco Bacterium in Litmus Milk 233 



125. Cross-section of Base of Stem of Datura stramonium (plate 43), showing Extent of Gray-white Bac- 



terial Ooze from the Vascular System about one-half Hour after Cutting 233 



126. Field of Tobacco in Japan Attacked by Bacterial Wilt 239 



127. Agar Cultures of Bacillus nicotianae (stab and streak) 240 



128. Agar Plate of B. nicotianae, showing Ringed Colonies and Brown Stain around them 240 



129. Rods of Bacillus nicotianae Uyeda 242 



130. Agar-poured-plate of Bacillus nicotianae 242 



131. Cross-section of Stem of Japanese Tobacco Received from Uyeda, showing Bacteria in Vessels. . . . 243 



132. Bacteria fromaStemof Japanese Tobacco Attacked by Wilt, for comparison with Bad. solanacearum. 243 



133. The same, Stained for Flagella, and more highly magnified 243 



134. Honing's Figure showing Effect of a Bacterial Saprophyte on the Sumatran Tobacco Bacterium . 259 



1340. Flagella of Sumatran tobacco organism 264 



1346. Tobacco plant wilted by motile bacteria, check on Fig. 134 a, \. c., inoculated from same culture . . 264 



135. Potatoes Inoculated with Bacterium xanthocUorum 275 



136. Stem of Vicia faba to weeks after inoculation with Bacterium xanthocUorum 276 



137. Brazilian manihot wilting from attack of bacterial disease 280 



138. Manihot: (a) stem showing bacterial blister and exudatc; (6) cross-section of stem showing upper 



part diseased ; (c) bacteria from same 281 



(Total figures 155.) 



