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December 31, 1880.J INDEX. 633 Faulkner, Mr. Robt., In Baker Street, “At Home,” 506 Ferrous oxalate developer, the, by F. York, 237, 285 oxalate developer,by Samuel Fry, 448 Ferron, J., and I. Paul, On the substitution of the glass support by flexible ones, paper, cloth, &c., 365 Film, gelatine, on retouching the, 1G2 Fire, destruction of Mawson and Swan’s Establishment, 44 Fixing prints, 286 Fluor spar crystals, photo-electricity of, 601 Fluorescence and phosphoresence, 529 Focus, Jum*., On gelatine plates, 265 Focussing for a view, on, 625 Foggy season, the, 1 Fog in gelatine plates, an unexpected cause 265 Fogging amd frilling, cures for, aids to the working of the gelatino-bromide process, by Capt. Abney, K.E., F.R.S., 328 Fogging, stored up light as a source of, 330 Fogging and frilling, 282 Forgeries, protection against photographic and otherwise, by John Spiller, F.C.S., 284 Formul, my, by E. B. Rogers, 17 France, Photographic Society of, 47, 107, 287, 335,407,443, 600 French Correspondence, 7, 19, 26, 56, 68, 93, 134,165.183, 208, 248, 272, 297, 316, 333, 351, 382,418, 421,453,476, 508, 519, 543, 581, 591, 616 Frilling, 113 Friswell,R.3, F.I.O., F.C.S.,Onthe valuation of silver nitrate and pyrogallic acid, 104 Fry, Samuel, On ferrous oxalate, 448 G Garratt, John, On clean negatives, 66 Gaslight, photography by, by P. Maitland Laws, 406 , Photographs by, 143, 349,373, 390 Gelatine, by John Matthews, 19 , 54, 546 , On the modification which it under goes through long-continued heating, and the effect produced thereby on the bromide emulsion, by Dr. Eder, 272 , the changes which it undergoes in emul sifying, by Dr. J. M. Eder, 352 development, by II. Bruyere, 352 , carbonate ammonia for, 443 for photo-mechanical printing, examina tion and selection of, by Adolph Ott, 308 , the liquefaction of, 198 failures, 310 process, notes on the, by Capt. Abney, R.E., F.R.S., 567 bromide, The preparation of, by M. Basch er, 405 [emulsion, how to test whether it con tains the highly sensitive form of silver bromide, 342 Gelatino-bromide process, the, aids to the working of; or cures for fogging and frilling, by Capt. Abney, R.E., F.R.8., 328 , defects in the, by Dr. Eder, 189, 201, 221 plates, the developing of, 378 negatives for photo-mechanical printing 354 for positive pictures, 318 prepared with glycerine, by Capt. Abney, F.R.8., 57 , at Munich, by R. Manners Gordon, 305 , manipulation of, 282 , process, theory of the, bv Dr. II. w. Vogel, 188 Gelatine process, enlarging by the, by II. J. Palmer, 621 , notes on, by M. Bascher, 376 , with glycerine, by Capt. Abney, R.E., F.R.8., 9 process, notes on the, by T. Chilton, 159, 184 emulsion places, light coloured spots on the, caused by fatty matter, 487 emulsion, proportion of gelatine to sen sitive salts, 210 , bromide and chloride of silver in, by Herbert B. Berkeley, 233 , coating plates with, by M. Noton, 100 emulsion plates, note on a new prepara - tion of, by H. Burton Jones, 53 plates, by J.S.C., 53 , the modern preparation of, by W. Bedford, 212 , preparing, by John Matthews, G5 , development of, 70 , 174, 237 , the development of under and over-ex exposed, 294 , a modified plan for developing, by W. Bovey, 292 , development of, by W. T. Wilkinson, 512 , intensification of, by silver, by Capt. Abney, R.E., F.R.S., 315 , intensifying with silver, 306 , practical experience with, by G. Gregory, 166 , by Focus, Junr., 265 plates, long emulsification and boiling, 606 plates, varnishing, by W. England, 100 plates, testing the sensitiveness of, 222 plates, working, by Capt. F. W. Turton, R.N., 250 plates, a few remarks on the washing of, in the studio, by F. P. Moffat, 273 plates, the rapidity of, 505 plates, rapidity and pitting of, by W. Barry Hull, 538, 541, plates, lessons learnt during a month’s tour abroad with, by Capt. Abney, R.E., F.R.8., 472, 481 , the price of, 526 films, how to remedy a defect in, by Edward Dunmore, 496 films, as a substitute for glass, 379 films as a substitute for glass, by Rev. II. J. Palmer, M.A., 315 film, retouching the, 162 negatives, the unvarnishing of, 138 negatives, the frilling of, 138 negatives, reduction of intensity in, 95,142 negatives, stains on, by J. W. Swan, 100 negatives, stains upon, 102 negatives, how to remove brown stains, and reduce density in, by A. J. Jarman, 309 —— tissue, 265 or collodion -which pays best ? by John 8. Hazard, 279 versus collodion, 527, 577 Ghent, International Exhibition of Photo graphy, 157, 461 Glasgow Photographic Association, 106, 130, 155, 180, 204, 216, 251, 324, 539, 552, 611, 624 Glass, testing for the developing room, 102 support, substitution of the, by flexible ones, paper, cloth, &c., by J. Ferron and T. Paul, 365 Glycerine developer, Mr. Edwards’, 210 " Gougalum,” 334 Gordon, Russell Manners, on gelatino-bromide at Munich, 305 Government grant for science, the, 97 Gowers, W. R., M.D., on drop shutters, 291 “Grain” in photo engravings, on a new method of obtaining, by Major J. Water house, Bengal Staff Corps, 568 Great Britain, Photographic Society of, 33, 81, 129, 179, 238, 286, 533,549, 610 Green wall paper, an experiment with, 526 Greenwich Observatory, photography at the, 289 Greenwich, at the Royal Observatory, “At Home,” 362 Gregory, George, On artistic photography, 5 On practical experience with gelatine plates, 166 H Hazkman, II. L, T., On oxalate as an intensi fier, 509 Halation, or blurring, in the case of gelatine negatives, 318 Ilardwich, Rev. T. F., On the oxy-hydrogen lime-light, 269, 279, 329 , On photographic transparencies, 234 Hart, F. W., Notes of an experiment on in tensifying a photograph in gelatine, 556 Hartley, W. N., F.R.S.E , On the application of photography to chemical research, 56) 573, 579, 604 Hazard, J. 3., On gelatine or collodion— which pays best? 279 IIemery, T. G., Truth in photographic portrait ure, 17 Henderson, A. L., Phosphorescent emulsion, 630 Hills and Saunders, Messrs., At Porchester Terrace, “ At Home,” 218 Hot air engine, small, for electrical purposes, 325 Huggin, W., D.C.L., L.L.D., F.R.S., On the photographic spectra of stars, 58, 99, 111 Hughes, Mr. Jabez, At Regina House, Ryde, “ At Home,” 398 , On developing dry plates in daylight, 416 Hull, W. Barry, On the rapidity and pitting of gelatine plates, 538, 541 Hydrogen lines, new, observed by photography, the star lines and the dissociation of calcium, by Dr. H. W. Vogel, 88 Hydroquinone, 426 Hydro-kinone as a developer, by Dr, J. M. Eder, 410 Hyposulphite washings, 438, 455 in the cardboard, 457 I Image, lateral spread of, during'alkaline deve lopment, by Captain Abney, 155 In and Out of the Studio, 1, 13, 25, 37,49,61,73, 85, 97,109, 121, 133, 145, 157, 169, 181, 193, 205, 217, 229, 241, 253, 265, 277, 289, 301, 313, 325, 337, 349, 361, 373, 385,397, 409, 421, 433, 445,457, 469, 481, 493, 505, 517, 529, 541, 565, 577, 589, 601, 613 India, photography in, by W. T. Wilkinson, 389, 465 Industries, photography and the, by Dr. H. W. Vogel, 388 Infant studies/ my—another new shutter, by T. G. Whaite, 525 In memoram, Mr. George Wharton Simpson, 42 Instantaneous photography, scientific accuracy in, by J. M. Vincent Elsden, B.S.C., F.C.S., 477 shutters, remarks on, by L. Warnerke and J. Cadett, 267 photographs, 325 shutter, a new, by G. L. Addenbrooke, 304, 326 photography, 414 . shutters, 241 shutter, by Lieut. L. Darwin,IR,E., 268