A Manual Of Photography

M. FLACHEROn’s PROCESS. 235 glass. Talte a piece of prepared paper, and place it marked, side downwards, upon a glass just prepared, beginning at the end nearest you, and thus chasing out the air. Draw it up once or twice by its two diagonal corners ; allow it to rest, and prepare glass No. 2 in a similar manner. Now look at glass No. 1, and it will be perceived that the violet tint of the paper has become mottled with patches of white, which gradually spread, and in a few seconds the paper resumes its original whiteness, which is an indication that it is ready for the camera. It will be found to adhere firmly to the glass. Do not remove it ; but hold the glass up to allow the excess of fluid to run off at one corner. It must not be touched with blotting-paper, but replaced flat on the table. Serve Nos. 2, 3, and 4, in like manner. Take four pieces of common white paper, not too much sized, free from iron spots, and cut a trifle smaller than the prepared sheet ; soalt them in distilled water ; draw out one piece, hold it up by the fingers to drain off superfluous moisture, and place it gently upon the back of the prepared paper. With another piece of glass kept for the purpose, having the edge rounded, and large enough to act uniformly upon the paper, scrape off gently the excess of liquid, beginning at the top of the sheet, and removing with the rounded edge of the scraper, the liquid to one of the corners. Repeat this operation twice. Both the excited and super- imposed paper are thus fixed to the glass. Two glasses and papers being thus prepared, take the clean glass No. 5, and place upon No. 1: press gently : the moist paper will cause it to adhere. Take up the two glasses thus affixed and place them upon glass No. 2, in such a manner that the supernumerary glass No. 5 shall be in the centre. The whole will form a compact body, and having polished the surfaces and wiped the edges, may at once be put in the paper-holders. * * * “ 4thly. With a Ross's, Chevalier’s, or Lerebours’ single lens, three inches diameter, and half an inch diaphragm, the object to be copied, well lighted by the sun, the paper will require from four to six minutes' exposure. “ 5thly. Take out the three glasses, which will still firmly adhere, separate them gently, anti remove the piece of moistened paper, which must not be used again. Now lift up the prepared paper by one corner to the extent of half the glass, and pour into the centre about one drachm of a saturated solution of gallic acid, which will immediately diffuse itself. Raise also the other corner to facilitate its extension; and serve the others in like manner. The image takes generally from ten to twenty minutes to devolope. Hold up the glass to a candle to watclx its intensity. When sufficiently developed remove the negative