. Rod and gun. e.\p<isid too near have found it uncertain in examining a plate in that the details do not show, though they can be .eenby examining the face of the plate ; especially in snow scenesis it dillicult to arrive at any definite conclusions in that as to density : I have never yet been able to determineby this method, with any degree of certainty, when it is lamp has a ruby and an orang« glass. lIo« close tn thellaiiie should th< plate b< held, and is it by means nf the flameitself or ordy the light of the ruby-lamp that the density isexam
. Rod and gun. e.\p<isid too near have found it uncertain in examining a plate in that the details do not show, though they can be .eenby examining the face of the plate ; especially in snow scenesis it dillicult to arrive at any definite conclusions in that as to density : I have never yet been able to determineby this method, with any degree of certainty, when it is lamp has a ruby and an orang« glass. lIo« close tn thellaiiie should th< plate b< held, and is it by means nf the flameitself or ordy the light of the ruby-lamp that the density isexamined? The plan I have iuloi)ted is to use nutliodsof determining the stage of development, but still contimiingit until the imexposed edges of the plate begin to turn you give me any more light on the subjict? I ilo not think that any ilireetions will .ay (hat the platemust nf)t be to the ruby light. I am incliiud tn believethat Mr. Sparliam must be in error on that point. Iiireclions. do, however, advise care, and recommend that the plate bekept as much in the dark as possible unless it is beingexamined. Then it may be held right up against the rubyglass, if necessary, but only for a short time. You must bearin mind that the faster a plate is, the more sensitive it will care is necessary in the case of ortliochromatic no account should an unfixed plate be held up to the flameof an ordinary lamp without a ruby glass in front of it. Norcan I say that 1 like the scheme of judging the developmentby looking at the edges of the plate. I dont believe in it. Theonly way to correctly judge development is by looking throughit. The prints, however, that Jlr. Sparham encloses areexcellent, and no matter how wrongliis theory of developmentmay be, his results certainly do not show it. Ked Siots ox -\kisto 1aieu.—In many places where thewater has in it a great deal of mineral or lime, red spots willmake their ajipearance on .\risto paper. In
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectf, booksubjecthunting
