platform board

3147 pla-tin-o-type, s. [Prefix platino-, and Eng. type.] Platonic-Christians platinum-lamp, s. platinum-nitride, s. IMG:content-1193.png:[blocks in formation] 130 grains to the ounce, at a temperature of from 170-180°. The ferrous salt forined by the action of the light reduces the platinum to a metallic state in the presence of the pota ic oxalate solution, thus forming the image. A wash in dilute hydrochloric acid, 1 in 80, completes the proce . plặt-In-ous, a. [Eng. plat in (um); -ous.] Con a in ing or consisting of platinum; of the nature of platinum.