Xli CONTENTS. 



PAGE 



Object-Marker, 127 



Lever Stage. . . . .128 



Object-Finder, ....... 



Magnetic Stage, . . . . . .130 



Diaphragm-Plate, ..... 



Achromatic Condenser, . . . . . . .131 



Keflecting Prisms, . . . 133 



White Cloud Illuminator, ..... .134 



Oblique Illuminators, ...... 135 



Black-Ground Illuminators, ....... 138 



Polarizing Apparatus, . ... . . . . 140 



Illuminators for Opaque Objects, ...... 143 



Stage-Forceps, ........ 146 



Glass Stage-Plate, ..... . 147 



Aquatic Box, . . . . . . . 148 



Zoophyte Trough, . . . . . . . .149 



Compressorium, ...... .150 



Dipping-Tubes, , . . . . .152 



Forceps, ... 153 



CHAPTER IV. 



MANAGEMENT OP THE MICROSCOPE. 



Support, ......... 154 



Light, 154 



Position of Light, .-^ . . . . . . 157 



Care of the Eyes, ...... .158 



Care of the Microscope, . . . . . . . 159 



General Arrangements, . . . . . . . 160 



Arrangement for Transparent Objects, . . . . .168 



Arrangement for Opaque Objects, . . . . . 175 



Errors of Interpretation, . . . . . . .180 



Comparative Values of Object-Glasses ; Test-Objects, . . . 192 



Determination of Magnifying Power, ..... 199 



CHAPTER V. 



PREPARATION, MOUNTING, AND COLLECTION OF OBJECTS. 



Microscopic Dissection, . . . . . . .201 



Cutting Sections of Soft Substances, ..... 204 



Cutting Sections of Harder Substances, ..... 205 



Grinding and Polishing of Sections, ..... 207 



Chemical Actions, . . . . . . . .211 



Glass Slides, ........ 214 



Thin Glass, ......... 214 



Varnishes and Cements, . . . . . . . 217 



Mounting Objects Dry, . . . * .. .221 



Mounting Objects in Canada Balsam, . . ' v . . 224 



Preservative Fluids, . . . . . . . .232 



Mounting Objects in Fluid, . . . "; , . . 234 



Cement-Cells, ...... . . 235 



Thin-Glass Cells, . . . . . . 236 



