LIST OF ILLUSTRATIONS XXIU 



90. Amoeba tes perlUio 121 



91. Paramecium caudatum dividing without mitosis 124 



92. Stsiges ia divi^oa oi Amceba polypodia 125 



93. Multiplication of Coccidium schubergi 126 



94. Herpetomonas musccB-domestictB. ,-131 



95. Trypanosoma tinea and Trypansoma perca .... 132 



96. Trichomonas eberthi 133 



97. Lamblia intestinalis ... 134 



98. Developvaent oi spoTOZoits in Laverania malaria . . . v .... 135 



99. Amoeba proieus 144 



100. Influence of oxygen on microorganisms .... 157 



101. Crystals of bacteriopurpurin . .^ . 177 



102. Carbon cycle 184 



103. Nitrogen cycle ...'.. ... 185 



104. Sulphur cycle , . . ... 186 



105. Action of light on bacteria ... 222 



106. Action of light on molds . 223 



107. Action of light on mold colonies . 224 



108. Chemotaxis . 230 



109. Cjirve of disinfection 233 



1 10. Influence of filtered water on typhoid fever and Asiatic cholera . . . 259 



111. Section of sand filter ... 267 



112. Unglazed porcelain filters ...... 269 



113. 114, 115. Location of wells on farm . . 271 

 1 16. -Construction of model well . 272 



117. TrickUng filter, sand filter, dosing tank, septic tank . . ... 285 



118. Septic tank . 286 



119. Non-symbiotic nitrogen-fixing organism (S. />ojte«r«o«Mi) . . 340 



120. Non-symbiotic nitrogen-fixing organism (Asotobacter vinelandi) . ' 34I 



121. Ps. radicicola 345 



.... 346 



349. 350, 351 

 369 

 373 



122. Section through root tubercle . 



123, 124, 125. Influence of Ps. radicicola 



126. Section of cow's udder 



127. Bacterial colonies in dust from udder 



128. Bacterial colonies from cow's hair. . . , . 374 



129. Bacterial colonies from dust of stable ... . . . 375 



130. Small-top milk pails . . . 377 



131. Ropy cream ... . . . 397 



132. Ropy cream organisms ... .... 398 



133. Chart of Rochester milk supply. . .... 402 



134. Gassy cheese .... . 422 



135. Cheese from lactic starter . . . . 423 



136. Influence of lactic organisms on casein degradation 429 



137. Swiss cheese . . . . . . ... . 434 



138. Kepfir grain 443 



138a Tubes for feces examination ... . . 505 



139. Bacteria of slimy wine. ... . . ... 513 



140. Bacteria of wine diseases. . . . . . . 514 



141. Vinegar bacteria 540 



142. Vinegar barrel ... 544 



143. Rapid process vinegar apparatus 547 



144. Ps. medicaginis 591 



145. Pear blight. 597 



146. Walnuts affected by bacteriosis 603 



147. Crown gaU 605 



148. Roots of cabbage plant affected with stump-root' 609 



