CONTENTS XV 



CHAPTER PAGE 



XVI. The growing Apex of the stem. Differentiation of the 



Tissues 204 



Fig. 79. Simple dissecting stand of Leitz .... 206 



,, 80. Small dissecting microscope of Zeiss . . . 207 



81. Large dissecting microscope of Zeiss . . . 208 

 ". 82. Longitudinal section of growing point of Hippuris 



vulgaris 211 



,, 83. Apex of stem of Euonymus japonicus . . . 213 



, , 84. Apical view of growing apex of Equisetum . . 215 



85. Longitudinal section of growing point of E. arvense 216 



,, 86. Longitudinal section of bud of Equisetum arvense 217 



XVII. Growing Apex (tip) of the root . ... V. . . .219 



Fig. 87. Longitudinal section of root-apex of Hordeum 



vulgare . . . ...... . . 221 



,, 88. Longitudinal section of root-apex of Thuja occi- 



dentalis 224 



,, 89. Longitudinal section of root-apex of Pteris cretica 225 



XVIII. Vegetative structure of the Bryophyta * - . * . .228 



Fig. 90. Cross-section through stem of Mnium undulatum 229 

 ,, 91. Germinating spores and protonema of Funaria 



hygrometrica . 230 



,, 92. Structure of stem and leaf of Sphagnum . . 232 



,, 93. Thallus and air-pores of Marchantia polynwrpha . 235 



XIX. Vegetative structure of I uugi, Lichens and Algae. Fixing 



and staining the cell-contents 237 



Fig. 94. Part of cross-section of stipe of Agaricus cam- 



pestris . . f . ... .239 



95. Cell of Cladophora glomerata ... . 247 



96. Cell of Spirogyra rnajuscvla ... 252 



XX. Diatomacese, Protococcus, Schizophycese (Fission Algae) . 255 



Fig. 97. Pinnularia i-iridis . . * . . 256 



,, 98. Protococcus viridis ...... 260 



,, 99. Anabcena Azollce . > . ", 261 



,, 100. Oscillaria princeps and 0. Frodichii . . . 262 



,, 101. Glceocapsa 2Jolydermatica 264 



XXI. Schizomycetes (Bacteria). Saccharomyces (Yeast) . . 265 



Fig. 102. Bacteria from the "fur" of teeth . . . .276 



,, 103. Spirochcete plicatilis 277 



104. Bacillus subtttis 278 



,, 105. Swarmers of B. subtttis 281 



,, 106. Saccharomyces cerevisiae 288 



