. Journal of applied microscopy and laboratory methods. Fig. 1.—Viscera of Frog. 1488 Journal of Applied Microscopy After using the various developers put on the market, with various degrees ofsuccess, I have at last struck upon one which fulfills all of my salt goes by the name of Ortol, and is purchased in sealed tubes with anaccompanying cartridge of the required amount of soda. The contents of eachare dissolved in 20 oz, of water and kept in separate bottles. Various grades of intensity may be gotten by regulating the strength of thesolution and by the use of more or less
. Journal of applied microscopy and laboratory methods. Fig. 1.—Viscera of Frog. 1488 Journal of Applied Microscopy After using the various developers put on the market, with various degrees ofsuccess, I have at last struck upon one which fulfills all of my salt goes by the name of Ortol, and is purchased in sealed tubes with anaccompanying cartridge of the required amount of soda. The contents of eachare dissolved in 20 oz, of water and kept in separate bottles. Various grades of intensity may be gotten by regulating the strength of thesolution and by the use of more or less soda as occasion requires. In Fig. 1 thedevelopment was carried slightly too far, but shows great contrast and the second illustration we have a transverse section of the human sciatic nervedeveloped for detail rather than Fig. 2.—Transverse section of human sciatic nerve. The following proportions may be varied somewhat according to exposure,but I have found them to answer for all purposes by using more or less bromide:For negatives: Ortol, - - - - 2 parts stock solution, Soda, . - . 2 Water, . - - - 4 For lantern slides : Ortol, - - - - 2 parts stock solution. Soda, - - - - 1 part Water, - - - - .3 bromide papers : Ortol, - . - - 1 part stock solution, Soda, ... - 1 < Water, - - - - 8 parts. I do not believe any definite rule can be set down as to just how much and Laboratory Methods. 1489 bromide shall be used, this being regulated by the judgment and experience ofthe operator. I have found it very convenient to use none at all in some cases,and again in others to stop the developer back so that an image will not appearin less than six or eight minutes. When working for extreme contrast, as in reproducing book illustrations,mechanical diagrams, etc., a plate sensitized specially for
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
