284 



INDEX 



Fixing fluid, Acetic-alcohol, 264 



Chromo-acetic, 263 



Corrosive-acetic, 263 



Flemming's, 264 



Hermann's, 263 



Perenyi's, 263 



- Solution, 270 

 Flare spot, 138 

 Flasks as condensers, 93 

 Flats, optical, 155 

 Flea, 252 



Flemming's fixing fluid, 264 

 Fluorite, 53 



Focal length of condenser, 120 



Equivalent, of objectives, 59 

 Focal planes, 59 



Focus, 146 



Focussing gear, 9, 19, 138 



-7- Hooke's handle, 10 



lens, 11 



screen, Card, 10 



- Clear glass, 11 

 Ground glass, 10, 11 



stage for metallography, 197 



substage condenser, 146, 148 

 Foot, tripod and horseshoe, 45 

 Fritillaria root apex, 262 



Gaslight papers, 228, 257 

 Gelatine colour screens, 155 



-To make, 156 



Geometric slide camera, 19 

 Glass crown and flint, 50 



Jena, 53 



- Optical, 53 



Refractive indices of typical, 276 

 Glazing prints, 230 



Glycerin as immersion fluid, 67 



Gnat, 252 



Goldberg, Dr. E., on " Sharpness of 



a Plate," 216 

 Gordon's camera, 21 

 Grain of plates, 216 

 Green screen for definition, 61, 254 

 Ground glass for even illumination, 



122, 133 



Hageh mercury vapour lamp, 93 

 Heidenhain's iron haematoxylin, 265 

 Halation, 217 

 Hardening negatives, 225 



solutions, 271 

 Heliostat, 84 



Hermann's fixing fluid, 263 

 Holoscopic eyepiece, 74 

 Holostigrnat, 79 

 Homogeneous immersion, 67 

 Horizontal camera, 2. (See Camera) 

 Horseshoe foot, 45 



Huyghenian eyepiece, 72 

 Hydra lantern plates, 234 



panchromatic plates, 214 

 Hydroquinone developer, 221, 257, 



268 



Hypo and acid hypo fixing baths, 

 270 



Eliminators, 225, 270 



Ilford Panchromatic plates, 214 

 Illuminants. (See Radiants) 

 Illumination, 145 



auxiliary condenser, with, 147 



convergent light, 124, 136, 150 



critical light, 114, 146 



- Even, 120 123 



Management of, 124 



Parallel, 125 



planars, for, 136 



reflectors, by, 128 



small solid objects, for, 128 



two condensers, with, 125, 134 

 Imbedding in paraffin wax, 259 

 Immersion fluids, 67 



and penetration, 65 



objectives, 67 



of objects for photomicrography, 

 65, 250 



Incandescent Electric light, 91 



gas, 97 



Initial magnifying power, 78 

 Insects, Camera for, 130 



Photomicrography of, 251 



- Preparation of, 252 



