. X-rays simply explained : a handbook on the theory and practice of radiography . horax, and the abdomen, the most difficult part, may even require 30 minutes with an apparatus which would give a -jxxl hand result in1 minute or 1Dry Plates and their Development. Ajiv good make i>\ rapid plates may lie chosen, hut the author in-variably uses Edwards cathodal plates which aremade especially for X-ray work, and an; only;id t<» the Lumiere brand for this particularpurpose. As the latter make is very expensive,theformer, which produces excellent results, is recom-mended and the method of pro
. X-rays simply explained : a handbook on the theory and practice of radiography . horax, and the abdomen, the most difficult part, may even require 30 minutes with an apparatus which would give a -jxxl hand result in1 minute or 1Dry Plates and their Development. Ajiv good make i>\ rapid plates may lie chosen, hut the author in-variably uses Edwards cathodal plates which aremade especially for X-ray work, and an; only;id t<» the Lumiere brand for this particularpurpose. As the latter make is very expensive,theformer, which produces excellent results, is recom-mended and the method of procedure t<» he adoptedwith it, shall he described. The developer is made up according to the follow-ing list of chemicals and proportions, and the twosolutions, if kept separate, will last almost indefinitely. X. 1. Eydrokmone . . 150 grains Metol . . 50 grains Citric acid .... 20 grainsSodium sulphite ... 2 ozs. Water .... 20 ozs. No. L. Caustic soda . . 150 grains Water .... 20 ozs. Take equal proportions of No. 1 and \o. 2 (ahout PRODUCTION OF X-RAY8. : Miscellaneous Group of Objects:—Fountain pen in cat tacles in case; pencil, showing graphite; bradawl, Bhowing grainof wood ; instruments in wooden case; leather parse containingcoin, and showing internal and external clasps and ornamentalmetal corners of flap. Conditions as for Plates II. and III., exceptexposure, which was 10 seconds. 00 X«RATB . I XIK\INKI». •l or B ozs. will be Kufliciunt f<T a whole plate) andmix tin-ill in a measuring gla h the developer is below 60 temperature standthe measuring -glass in warm water and continuallystir it- contents until they have reached thattemperature. Dust the plate carefully and layil film upwardsin tlic tray, then pour the developer evenly andquickly over it, giving the dish one or two suddensideway jerks to detach air-bells, Cover tlic plate as usual (for even the dark-roomlighl will easily fog rapid plates), and rock gently. After 20 minutes devel
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcathode, bookyear1903
