IMPROVEMENTS IN PHOTOGRAPHY.

Waikato Times, Volume XVIII, Issue 1500, 14 February 1882, Page 2

IMPROVEMENTS IN PHOTOGRAPHY.

The substitution of a film of dried gelatine for the thin layer of wet collodion, which the photographer formerly employed as a vehicle to retain the sensitive salts of silver in a suitable condition on his glass plate, has involved considerable alterations in the mechanical appliances used in photography. For out of doors work, or work away from home, the photographer no longer requires to carry what was practically a portable laboratory. Not having to "develqp" his pictures on the spot, he need take with him neither dark tent nor chemicals. On th© other hand, he must have some provision by which hia store of dry plates can be placed, one after the other, in the cameras and properly ''exposed " without the risk of the slightest particle of light reaching their sensitive surface, other than the light properly directed upon them by the lens. As he wishes to carry an ample supply of plates with him, and as the glass plates themselves make an appreciable burden in a long walk, it is essential that the apparatus for carrying them $.houl4 t> e a- 8 light as. possible ; hence have, ariseii _co.nsidenible improvements in the camera and, its . " slides,"- Again, . the increased sensitiveness of the gelatine films makes it possible to give .exposures shorter than can be effected^by, the hand uncappijlg and recapping the lens ; hence the invention of numerous f instantaneous shutters,"* by whi6h,>exposures of a few hundredth? of can be given, and pictures of moving objects readily secured. Theses are but instances of the manyjhovel appliances vijhicsh recent progress in photographic sciences jhas qrigiriatod ? '"anil,;b|si,de^ *$he se,; ; there : has: been", *clurmg i'ecent 5 years, "'many' suad' imp\oj^nt\improyemOTte-'in.^,tl|p^appUc^' iiojw^bf iphoip'gc&'giiiy^^ 0$ !prpduction 61;permanenfe £fluipjfatiqnsVior a , sookg - and