814 



INDEX 



Banfield, A. C., 275 



Bannister, 0. 0., 304 



Barnet orthochromatic plates, 220, 

 290, 293, 294, 298. 300 



Bastian Mercury Lamp Co., quartz 

 tubes, 94 



Bausch & Lomb, horizontal camera, 

 129 



Beard, R., limelight regulator, 86 



Beck, R. & J., metallurgical micro- 

 scope (Rosenhain), 260; rings for 

 mounting specimens, 266 ; specu- 

 lum for arc light, 1 08 ; vertical 

 camera (Gordon), 119 



Beck, Conrad, 310 



Beech, stem of, 284 



Beilby, G. T., 62 



Bibliography, 310 



Bichromate of potash, 212, 290 



Blood, pigeon's, 294 ; guinea-pig, 

 with 7?. anthracis, 297 ; in Bubonic 

 plague, 296 



Blow-fly, proboscis of, 28, 285 



Blow-through jet, vide Lime-light 



Botanical specimens, 162 



Bousfield, Dr., 222, 310 



British Oxygen Co., steel cylinders, 

 85 



Bromide-prints, 199, 232, 239-240; 

 developers for, 240 



Bubonic plague, 296 



Bull's-eye for illuminating opaque 

 objects, 61, 63 ; as auxiliary col- 

 lecting-lens, 69, 169, how to use, 148, 

 149 



Burroughs Wellcome, tabloid de- 

 velopers, 234 



CALCIUM carbide, 78 

 Camera, position and support, 111, 

 117, in relation to microscope, 

 112, 188, on geometric slide, 

 133 ; connection to microscope, 

 178 ; precautions against dif- 

 fused light, 179 



vertical, Swift, 113, Zeiss, 114, 

 251, Leitz, 114, Van Heurck, 

 117, 295, J. W. Gordon (R. & 

 J. Beck), 119, 192, improvised 

 form, 119 



horizontal, Swift, 121, 129, 

 Watson, 122, Ross, 123, Zeiss, 

 126, Bausch & Lomb, 129, 

 Author's. 130, 135, 175 ; control 

 of fine adjustment, 122, Zeiss, 

 128, 132, 190, author's, 130, 132 



combined vertical and horizontal, 



Leitz, 115, Watson, 116, Zeiss, 

 137 



for instantaneous photos., 139 ; 

 reflex, 140, 141, 295; for 

 opaque objects, 141 ; for 

 metallurgical objects, 141, 

 Leitz micrometallograph, 142 

 length of, with and without pro- 

 jection-ocular, 41, effect on 

 magnification, 194, 195, 197, 

 283 ; size of, 181 



Canada balsam, 24, 255; effect of 

 mounting in, 154 ; refractive index, 

 306 



Carbon- filament lamps, 88 ; difficulty 

 from small area, 107, J. W. Gordon's 

 device to overcome, 107 

 Carver, Dr. T. A. B., arc-lamp, 101 ; 

 photo-micrographic apparatus, 130 

 Cedar- wood oil, 19, 150; for sub- 

 stage condensers, 56 ; refractive 

 index, 306 



C3lls for fluid screens, vide Liquid cells 

 Csmented steel showing carbide of 



iron, 304 



Csntration of light, 148, 162, 164 ; of 



objectives, 32, 163, with nosepiece, 



36-38 ; of sub-stage condensers, 



161-166 



Centreing stage, 7 ; sub-stage of 



condensers, 8, 160 



Chapman & Jones, sensitometer, 223 

 Cheshire apertometer, 309 

 Cholera, Koch's spirillum of, 297 

 Chromatic aberration of objective, 

 21 ; tests for, 29-30, 300 ; correc- 

 tion for, 152 

 Clematis, stem of, 284 

 Collecting-lens systems, 69 ; object 

 of, 162 ; advantages and dis- 

 advantages, 169 ; method of 

 using, 170-172, 174, with pro- 

 jected image, 173 

 bull's-eye, 61-63, 69, 169, how 

 to use, 148, 149 ; E. M. Nelson's, 

 70, 169, 284, 287 ; Watson- 

 Conrady, 70, 169 ; Dr. Kohler's 

 (ZeissU 1,290, how to use, 170- 

 172, 181 



supports for, 73, geometric-slide, 

 73, 170; with Welsbach gas, 

 74 ; with paraboloidal con- 

 denser, 58 ; as affecting work- 

 ing aperture of condenser, 173 ; 

 in metallurgical work, 264 

 Collimator, 174 



Collodion, films for colour-screen, 207 ; 

 emulsion, 218 ; wet-plates, 218, for 



