FIG. 73. Seedling Sweet-corn Plant in Stage 



when most of Infections occur 89 



74. Stomatal Infection of Sweet-corn Leaf 



by Bacterium Stcwarti 90 



75. A Detail from Fig. 74, highly magnified. 91 



76. Water-pore Infection by Bacterium cam- 



pestre 92 



77. Bacteria from Fig. 76, enlarged 2,000 93 



78. Single Spiral Vessel occupied by Bac- 



terium campestre 93 



79. Water-pore Infection in Cabbage; a 



later stage than that shown in Fig. 76. 94 



80. Angular Leaf-spot of Cotton, Nearly 



Natural Size 95 



81. End of Vacuum-pipe on Laboratory- 



table 96 



82. Portion of Work-table, showing Simple 



Apparatus for Distilling Water 97 



83. Apparatus for rapidly filling Test-tubes 



with Measured Portions of Fluid Cul- 

 ture-media 98 



84. Can for holding Culture-media 99 



85. Wrapped Petri Dishes 100 



86. Meyer's Hypodermic Syringe 101 



87. Sections through Tooth of a Cabbage- 



leaf, showing Entrance of Bacterium 

 campestre 102 



88. Green Cucumbers soft-rotted by Bacillus 



carotovorus 103 



89. Block for holding Test-tube Cultures. .. 104 



90. Constant Burner, with Cut-off for re- 



ducing Size of Flame 105 



91. Steel Sewing Needle (Nu. 10) set into 



Bone-handle and used for Puncture- 

 inoculations 106 



92. Compressed-air Tank and Spray-tube... 107 



93. Atomizers for use with 92 108 



94. Hand-sprayer for Distribution of Bac- 



teria I0 9 



95. Inoculation Cage for Herbaceous Plants, no 



96. Labels from Test-tube Cultures m 



97. Wooden Labels from Inoculated Plants, in 



98. Temperature-record Sheets 112 



99. Nitrate-bouillon Records 113 



100. Sample from Card-catalogue, Two-thirds 



Actual size 114 



101. Heading of Large Sheet for Volumi- 



nous Abstracts 1 14 



102. Green-cucumber Skin, Contents rotted 



out by Bacillus aroideae 115 



103. Pillsbury Slide-boxes 116 



104. Another Form of Pillsbury Slide-box. .. 117 



105. Small Paraffin-oven used by writer 118 



ILLUSTRATIONS. 

 Page. 



... 119 



hold- 



XI 



Page. 



FIG. 106. Infiltrated Tissues embedded in Par- 

 affin in a Watch-glass 1 19 



107. Infiltrated Material mounted ready to 



cut 



108. Drawer with Compartments for 



ing embedded material 120 



109. Coplin's Staining Jar 121 



no. Coplin's Staining Jar, cross-section 121 



in. A Series of Coplin's Staining Jars 



Ready for Use 121 



112. A Page from the Paraffin-record-book.. 122 



113. A Mounted Slide of Serial Sections 122 



114. A, Rodgers knife for serial sections; B, 



Lentz knife for cutting hard material 

 with slant stroke ; C, Torrey knife for 

 serial sections; D, Torrey knife for 

 free-hand sections, a, b, c, d, end 

 views of A, B, C, D 123 



115. Leaf -tooth of Cabbage infected by Bac- 



terium campestre 124 



1 16, 1 17. Details from Fig. 1 15 124, 125 



118. Stomatal Infection of Cotton-leaf by 



Bacterium mahacearum 126 



119. The Reinhold-Giltay Microtome Ar- 



ranged for cutting Celloidin, etc 127 



120. Sub-stage Arrangement on Zeiss 



Stand Ic 130 



121. Newer Form of Zeiss-Abbe Camera 131 



122. Zeiss Planar Lenses 132 



123. Apparatus for Photographing Natural 



Size 133 



124. Swinging Camera for Equal Lighting 



of Exposed Object 134 



125. Petri-dish Poured Plate photographed 



by transmitted light 135 



126. Green Leaf (Delphinium) with Black 



Spots; photographed on a rapid non- 

 isochromatic plate 138 



127. Green Leaf (Delphinium) with Black 



Spots; photographed on a slow i so- 

 chromatic plate 139 



128. The Wager Exposure-scale 141 



129. The Collins-Brown Camera, made by 



Folmer & Schwing 145 



130. Cross-level for use with Camera 146 



131. Device for cutting out light in Air-shaft. 146 



132. Side-view of a Dark-room, convenient 



for a few persons 147 



133. Top-view of a Dark-room, convenient 



for a few persons 148 



134. Side-view of another Small Dark- 



room . 148 



'35- Top-view of a Small Dark-room shown 



in Fig. 134 149 



