VIII 



LIST OF ILLUSTRATIONS. 



Page. 



Fig. 115. Solvent action of Bad. campestre on 



middle lamella' 3 ' 7 



116. Beginning of cavity in a Turnip-root. 318 



117. Closed cavity in a Turnip-root due to 



Bad. campestre 318 



118. Cross-section of Turnip-root showing 



many cavities and vascular occlu- 

 sions due to Bad. campestre 318 



119. Cross-section of Rape-petiole showing 



Bacteria confined principally to 

 the Bundles 3 1 9 



120. Longitudinal section showing non- 



lignified cells of Turnip-root filled 

 with Bad. campestre. These border 

 1 hi a reticulated vessel 3- 



121. Flagellate Rods of Bad. campestre 



from an Agar Culture 321 



122. Rods of Bad. campestre from Stem of 



Charlock (polar staining 3 ) 321 



123. Rods of Bart, campestre from Kohlrabi 



from a Gelatin Culture 321 



124. Rods of Bad. campestre from a smear 



from a Cabbage-stem, enlarged 

 from a photomicrograph 321 



125. Rods of Bad. campestre from a Potato 



Culture kept at 12 C 322 



126. Ditto from a 48-hour Bouillon Culture 



at3o" C 322 



127. Ditto from a very old browned Potato 



Culture ;-- 



128. Portions of three Agar Plates poured 



from stem of Collard (fig. 105 at xi 

 Size of colonies is reduced by 

 crowding 3-i 



129. Liquefaction of Gelatin by Bad. 



campestre 325 



130. Nongrowth of Bad. campestre over 



Chloroform 327 



1300. Left. Cabbage leaf extruding fluid 

 from water pores. Right. Cabbage 

 leaf showing early stage of marginal 

 (waterpore) infection 332 



Pay e 

 Fig. 131. Cross-section of Hyacinth Bulb, show- 

 ing an early stage of Infection 

 (7 Yellow Bundles) due to Inocu- 

 lation of Scape .\\<> 



132. Cross-section of a Hyacinth Bulb 



Infected from a Flower Stalk 337 



13.?. Haarlem Bulb Scale, showing Dis- 

 organization of Parenchyma 34 1 



134. Cavity in Parenchyma at extreme 



base of a Bulb-Scale (inoculated 

 plant) 342 



135. A detail from fig. 134 342 



136. Cross-sections of badly Yellowed Bulbs 



(Wakker's disease) obtained by the 

 writer in Holland 343 



137. Cavity in an Inoculated Leaf 344 



138. A detail from 137 345 



139. 140. Rods of Bad. hyacinthi 3;s 



141. Non-segmented threads (filaments) 



of Bad. hyacinthi 345 



142. Flagellate rods of Bad. hyacinthi 343 



143. Action on Milk of lab ferment pro- 



duced by Bad. hyacinthi 346 



144. Stab-eultures in Gelatin containing 



Malic Acid 347 



145. Behavior of Bad. hyacinthi in fermen- 



tation-tube in presence of Maltose 

 and Peptone 34 s 



146. Behavior of Lead Acetate Paper ex- 



posed over cultures of Bad. 

 hyacinthi 349 



147. Parts of Agar Poured-plates of Bad. 



hyacinthi, showing slow growth of 

 buried and surface colonies in pure 

 culture 349 



148. Shagreened surface sometimes seen in 



Streak-cuLures of Bad. hyacinthi 



on Sugar-agars !5o 



