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For this purpose the following solution is used: Put about two ounces of hyposulphite of soda in a pint of water, which should always be filtered before using. A convenient way of doing this is to have two bottles, and a large funnel with a sponge pressed into the neck of it; or, what is better, some filtering paper folded in it.
"'Bäout twenty-five thäousan' mild," said the boy he asked, "'f y' go 'z y' 'r' goin' näow, 'n' 'bäout häaf a mild 'f y' turn right räoun' 'n' go t'other way." The negative picture being formed, it is washed with a solution of hyposulphite of soda, to remove the soluble principles which are liable to decomposition, and then coated with shellac varnish to protect it.
We may sum up by saying that very fine particles scatter more blue light than red light, and that consequently more red light than blue light passes through a turbid medium, and that the rays obey the law prescribed by theory. I will exemplify this once more by using the whole spectrum and placing this cell, which contains hyposulphite of soda in solution in water, in front of the slit.
For use, fill your small bottle, having a quill in the cork, with alcohol, and add a few drops of the above, or enough to change it to a bright orange or saffron color. A Substitute for the Hyposulphite Solution. M. DAGUERRE recommends the use of a solution of salt water for removing the coating off the plate. I found this of some service at one time during my travels.
Some of these elements are therefore removed by washing it with a solution of hyposulphite of soda, after which it is rinsed with pure water. It is now permanent in the light, but a touch wipes off the picture as it does the bloom from a plum. To fix it, a solution of hyposulphite of soda containing chloride of gold is poured on the plate while this is held over a spirit-lamp.
Coloring Back Grounds Transparent ditto Gilding Dissolvent Solution for removing Specks Solarized Impression To Purify Water Cleaning Mercury Adhesive Paper Black Stain for Apparatus Sealing Wax for Bottles Rouge Rotten Stone Potassa Solution Hyposulphite Solution Substitute for do.
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