Elements of the Art of Dyeing With a Description of the Art of Bleaching By Ox
Elements of the Art of Dyeing With a Description of the Art of Bleaching By Ox
Claude Louis Berthollet
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" 14. Platinum, zinc, arsenical acid, tin, co- balt, and manganese, experience no change. " 15. The (saline?) solutions of lime, magnesia, alumina, and barytes, are not decomposed ; but lime water causes an abundant grey precipitate. " 16. The salt of nut-galls is changed into oxalic acid when nitric acid is distilled from it in the usual way. " The white precipitate obtained when acetate of lead is thrown down by nut-galls, may be again decomposed by vitriolic acid, and the salt of nut-galls i...s thus obtained in its greatest purity. Since the infusion of nut-galls precipitates the acetate of lead, I thought that I might be able to procure this salt in a manner still more ex- peditious ; but this did not succeed with me, for when I had decomposed this precipitate by means of vitriolic acid, I recovered my infusion of galls with its ordinary astringent taste. OF ASTRINGENTS. 93 " If gall-nuts be distilled with a violent heat, an acidulous phlegm is obtained, the smell of which is not disagreeable ; no oil passes, but to- wards the end a volatile salt rises, like that ob- tained from the salt of gall-nuts distilled, and which has the same properties.
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