. Portrait . running in a small addi-tional amount of the sodium sulphide solution. Ifmore sludge is formed, the silver has not been com-pletely precipitated and more of the sulphide shouldbe added. The precipitating vessel should be fittedwith a tap five or six inches from the bottom so thatwhen the silver has all been precipitated and settledthe liquid at the top can be drawn ofi and further wastesolutions treated. When a sufficient amount of thesludge has collected at the bottom it can be washedwith cold water by decantation and poured into somesuitable container in which it can be sent to
. Portrait . running in a small addi-tional amount of the sodium sulphide solution. Ifmore sludge is formed, the silver has not been com-pletely precipitated and more of the sulphide shouldbe added. The precipitating vessel should be fittedwith a tap five or six inches from the bottom so thatwhen the silver has all been precipitated and settledthe liquid at the top can be drawn ofi and further wastesolutions treated. When a sufficient amount of thesludge has collected at the bottom it can be washedwith cold water by decantation and poured into somesuitable container in which it can be sent to the smelter. A number of determinations have been made of theamount of silver recoverable from fixing baths, andallowing for the different amount of work done by thevarious baths an average of 43 grains per gallon ofbath was obtained. —The Photographic Journal of America. PORTRAIT Another Ansco Man in the Service Phil B. Keeler, Ansco Companys Cyko demon-strator, who has been calling on the photographers in. California for several years, has been commissioned acaptain in the non-flying officers corps of the Air Sec-tion of the United States Army. He is now located atthe U. S. A. Aeronautical Engineering School, Mass-achusetts Institute of Technology, Boston, Mass. PORTRAIT A Satisfactory Solution of the Print WashingProblem THE problem of proper print washing has ahva\sbeen a serious and important one to the photog-rapher who values his reputation above all otherconsiderations, as prints not properly washed, eventhough of finest quality, will prove a boomerang toany studio. The particular workman has no doubtworried more over the uncertainty of proper hypoelimination than anything else, especially during thewinter months when average tap water is hoveringaround the freezing point. In hand washing from tray to tray, or in a washing-box connected by rubber hose to the tap, it is necessaryto handle the prints over and over again with thehands almost continually immersed in icy w
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Keywords: ., bookcentury1900, bookdecade1900, bookidpo, booksubjectphotography
