Photo-Micrography Abraham Cowley Malley

ISBN: 9781230236315

Published: September 12th 2013

Paperback

38 pages


Description

Photo-Micrography  by  Abraham Cowley Malley

Photo-Micrography by Abraham Cowley Malley
September 12th 2013 | Paperback | PDF, EPUB, FB2, DjVu, audiobook, mp3, ZIP | 38 pages | ISBN: 9781230236315 | 10.27 Mb

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 edition. Excerpt: ...is sufficiently washed,MoreThis historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher.

Not indexed. Not illustrated. 1885 edition. Excerpt: ...is sufficiently washed, take some of the waste water running from the faucet into a two-ounce bottle and add a few drops of silver solution- there will be a, precipitate of bromide of silver. In an hour take some more of the waste water, and add a few drops of silver solution, and if there is no precipitate of bromide of silver, the emulsion is washed enough.

If there is still a precipitate of bromide of silver, continue to wash until, upon trial, there is no precipitate formed. Stirring the emulsion several times will hasten the washing. Never take off the cover to the washing box, except in red light after you add the brine. The emulsion is now ready to be preserved for future use, or to be used at once. To use at once, tie a piece of coarse canvas over a large bowl, pour the emulsion on to canvas and let it drain free of excess of water- put back into pitcher and place into hot water in apparatus described hereafter.

Melt at a temperature of 140 to 150. Add two ounces alcohol and two ounces pure albumen. (To prepare the albumen, beat the white of eggs to a stiff froth and set aside to go back to liquid). Add two drops of a saturated solution of chrome alum in water to each ounce of emulsion- this is to keep the gelatine from frilling.

There should be 35oz. of emulsion when finished- if not, make up with water. Make smaller quantities in proportion. To Flow The Plates. Filter the emulsion through a piece of moist flannel in the glass funnel, placed in the tin funnel as described hereafter- filter into a small pitcher that will hold about six ounces. You can have several of those small pitchers in hot water- as you empty one you can be filtering more while you use the others. The small pitchers are for flowing out. Have your plates...



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