XII 



ILLUSTRATIONS. 



Page. 



FIG. 136. Case for protecting Squeegee-plates 



from Dust and Scratches 149 



137. Bacterium triloculare, Ehrenberg"s first 



figure 166 



138. Bacterium triloculare, Ehrenberg's sec- 



ond figure 169 



139. Bacterium termo, figured by Cohn 170 



140. Dallinger and Drysdale's conception of 



Bacterium termo 170 



141. TVrmo-like Organism obtained by 



throwing Beans into Water 170 



Page. 



FIG. 142. Iris-rhizome-rot; Crowded Agar-plate 



after 45 hours at 25 C 179 



143. Iris-rhizome-rot ; Thin Sowing on Agar 



at end of 4 days ; temperature 25 C. . 180 



144. Bacillus aroideae grown on Agar-plate 



at 37 to 38 C 182 



145. Bacillus aroideae grown on Agar-plate 



at 25 C 183 



146. Apparatus for Gradual Substitution of 



Alcohol for Water in Tissues 184 



