290 



Index 



Metal-holder, 38 

 Metallurgical microscopes, 36 

 Metal specimens, 187 

 Methylated spirit for hardening, 133 

 Mica-selenite stage, 103 

 Micrometers, 115 



Micro-organisms, staining and mount- 

 ing, 158 

 Microscope, care of, 121 



parts o{ described, 7 



stages, 11 



stand, the, 6 



the choice of, 42 



travellers', 39 

 Microscopes by Leitz, 43 



how to test, 46 



metallurgical, 36 



mounting, 40 

 Microscopical societies, 3 

 Microtome processes recapitulated, 



284 

 Microtomes, 229 



Beck's Delepine, 233 



Becker's Spengel, and others, 237 



British, 231 



Cambridge rocking, 144 



Oathcart's, 140 



Cole's, 139 



construction of, 235 



Thoma's, by Jung, 234 

 Microtome knives, 250 



Henking's, 249 



in sectional view, 251 



Jung's, 250 



makers, addresses of, 248 



selection of, 250 



sharpening, 253 



Thoma's, 251 



Weikert's, 250 

 Minot-Zimmermann microtome, 240, 



241 

 Mirrors, 30 



parallel worked , 30 

 Mono-bromide of naphthalin, 58, 60 

 Monochromatic light, 84, 98 

 Mounting in Canada balsam, 148 



microscopes, 40 



reagents, 128 



without pressure, 189 

 MuUer's fluid, 133 

 Muscle, 205, 155 

 Mycetozoa, 180 



N. 



Negative eyepiece, 50 



Nerve fibres, 156 



Nitrate of silver staining, 145 



stains, 147 

 Normal fluids, 132 



Nosepiece iris diaphragm, HI 

 Nosepieces, revolving, 110 

 Numerical aperture, 61 



O. 



Objectives, achromatic, 55 



apertures of, 60 



apochromatic, 1, 54 



back lens of, 67 



care of, 123 



choice of, 75 



holoscopic, 56 



immersion, 58 



initial magnification of, 69 



initial power of, 53 



measurement of, 114 



pan-aplanatic, 56 



semi-apochromatic, 56 



testing, 70 



wrongly described, 70 

 Oil-immersion condensers, 98 



objectives, 58 



system, 60 

 Olfactory region, methods of harden- 

 ing, 134 

 Opaque cells, 220 



mounts, 221 

 Optical construction, 48 



index (O.I.), 64 

 Osmic acid, 166 

 Ovaries, 168 

 Over-correction, 49, 52, 65 



P. 



Page's gas regulator, 260 

 Palates, 204 



Pan-aplanatic objectives, 56 

 Parabolic reflector, 105 

 Paraboloid, 101 

 Parafiin, cooling, 269 



crystals, photomicrographs of, 

 269, 270 



cubes, 271 



infiltrating, 258, 266 



melting points of, 273 

 Parasites, 193 

 Pearlite, 188 



Petrologioal microscopes, 40 

 Pharmacological specimens, 174 

 Picric acid, 135 



Picrocarmine, staining with, 157 

 Pitcher plant, 183 

 Polariscope, 102 

 Polariscope objects, 200 

 Pollens, 173 

 Polycystina, 206, 207 



selecting, 208 

 Portable microscopes, 39 



