SUBJECT INDEX 



865 



Gamma infinity, 181-182 



Gelatin, photographic, 117 



Gelatin baclcing, 123-124 



Gelatin relief color process, 648-651 



Geologic field photography, 799-803 



Ghost image, 22 



Glass, Abbe number of, 40 



barium, 40 



index and dispersion of, 40 

 Glass plate characteristics, 121-122 

 Glycine, 323, 335, 368 



Gradient speed, minimum useful, 195-196 

 Grain structure of emulsion, 118-119 

 G raininess, 129 

 Grating mountings, 813-814 

 Gum printing, 486-493 



H 



Intensification, 547-554 



local, 559-560 



proportional, 550 



subproportional, 550 



superproportional, 550 

 Intensifiers, characteristics of common, 549 



chromium, 551-552 



mercury, 552-553 



negative gradient, 551 



physical, 553 



positive gradient, 551 



silver, 553 



uranium, 553-554 



zero gradient, 551 

 Intermittency effects, 161-162 

 Iris diaphragm, 18 

 Ives stereo system, 590-591 



H and D, characteristic of, 134, 177 

 curves for chloride paper, 142 



Halation, 525-526 



Half-tone engravings, prints for, 437-438 



Halide crystals, silver, 118-119 



Harcourt pentane lamp, 155 



Hardeners, 343-344 



Hardening fixing bath, acid, 444 



Harmonizing, 559 



Hartmann mierophotometer, 752 



Harvard Sky Maps, 738 



Hefner lamp, 155 



Heliostat, 743 



High-speed photography, 762-769 



Hydramine, 327 



Hydroquinone, 320, 328, 334 



Hyperfocal distance, 25, 90-91 



Hyperstereoscopy, 588 



Hypo, electrical methods of testing, 405 

 eliminators, 407 

 test solution for, 404-405 



Illumination, brightness of optical, 18 



depth of focus in, 24 



distance of, 15 



ghost, 22 



reversal of, 522 



size of, 16 



of sloping object, 17 



variation of illumination over image, 20-21 

 Image brightness, as function of filter, 214 



of optical systems, 212-214 

 Image tone, of prints, 145 

 Imbibition process, 150 

 Inertia, of photographic material, 180-181 

 Inertia-speed ratings, 193-195 

 Infrared, sources of, 603-604 

 Infrared photography, 602-614 



applications of, 610-614 



filters for, 604-606 



lenses for, 49 



methods of, 608-610 



Javelle water, 496 



Kodachrome, 151, 661 



Kodak {see Lenses) 



Kodak coupled range finder, 85-86 



Kodak pocket range finder, 84-85 



Lamps, carbon arc, 28.5-286 



controlling light output of, 284-285 



photoflash, 286-288 



photoflood, 282-285 



voltage effect, 158-160, 435 

 Lantern slides, 139, 449-450 

 Leica coupled range finder, 86-87 

 Lenses, absorption and reflection in, 226-227 



achromatic, 30-31 



action of, 13 



aero, 49 



Agfa, 54 



Aldis, 44, 54 



Alvan Clark, 44 



anamorphic, 50 



anastigmat, principal types of, 53-67 

 - angular field of, 27, 33-34 



Aplanat, 39 



apochromatic, 31, 49 



Astro-Gesellschaft, 54 



Astro Tachar, 43 



astronomical photographic, 51, 737-741 



Bausch and Lomb, 55 



Bausch and Lomb Aero, 43 



Bausch and Lomb Metrogon, 44 



Bausch and Lomb Plastigmat portrait, 52 



Bausch and Lomb Raytar, 45 



Beck, 55 



Beck Biplanat, 53 



Beck Bystigmar, 42 



Beck Isostigmar, 52 



Beck Neostigmar, 43 



Beck Portrait Biplanat, 53 



Beck Symmetrical, 53 



