INDEX. 



327 



Condenser, Collins' Webster, 66 



Webster's, 65 



Powell and Lealand's, 68 



oil -immersion, 68 



Reade's, 68 



Wollaston's, 65 



Swift's, 67 



Condy's pink fluid, 251 



Construction of objectives, 47 



Convex lenses, loo 



Cordylophora, 160 



Cotton fibres, 302 



Cover adjustment, 112 



Covers, thin glass, 275 



Crane fly, internal organs of larva of, 



177 



Cristatella mucedo, 155 

 Crouch's Premier binocular, 20 

 Crustacea, 136 

 Cuticles, mounting, 304 



staining, 259 



Cutting sections of animal tissues, 192 



bone, 201 



coal, 200 



rocks, 199 



teeth, 201 



vegetable tissues, 189 



Cyclops quadricornis, 136 

 Cydippe, 160 

 Cypris tristriata, 136 

 Cystopus candidus, 144 



D. 

 DAMMAR and benzol, 322 



mounting in, 301 



Daphnia pulex, 136 

 Barker's selenite films, 241 

 Dark wells, 81 

 Dasya coccinea, 133, 272 

 Deane's medium, 320 



mounting in, 308 



Defining power of objectives, 103, 105 

 Dehydrating agents, 313 

 Delineation of objects, 203 



by ruled squares, 204 



Depth of focus, 1 14 

 Desiccator, 287 

 Developing negatives, 221 

 solutions, 221, 222 



Diamond dust, charging slitter with, 



196 

 Diaphragms, 63 



Collins' graduating, 63 



Dancer's aperture, 124 



iris, 63 



Swift's calotte, 64 



Diatom illuminator, 72 

 Diatomaceae, 117, 137 

 Diatoma vulgare, 140 

 Diatoms, cleaning, 139, 288 



mounting, 291, 299 



arranged slides, 291, 294 



separating, 290 



where to find, 137 



Didymium oxalate, spectrum of, 253 



Diffraction, results of, 122 



Diopside, rings in, 246 



Dipping tubes, 130 



Diptera, 146 



Disc-holder, 83 



Disintegration of vegetable matter, 180 



Dissecting, bedding agents for, 167 



knives, 168 



' microscope, Collins', 163 



Houston's, 163 



Lawson's, 164 



Stephenson's binocular, 165 



needles, 167 



scissors, 169 



the blow-fly, 171 



the object of, 177 



the use of, 181 



vegetable matter, 179 



Distortion, freedom from, 112 

 Dollond's experiments, 45 

 Doublets, Wollaston's, 45 

 Double-image prism, 240 



nose-piece, 60 



Double staining, 262 



carmine and green, 262 



picro-carmine, 263 



wood sections, FRONTISPIECE 



Draw-tube, 58 



Drying preparations, 287 



Dry mounting, 285 



plates, 213, 228 



Dytiscus marginalis, 146, 170, 172, 



300 



