Granulated ferric hydroxide

Adsorption filters for radium on granulated barium sulphate and arsenic on granulated ferric hydroxide (two parallel lines)... 

Cyanogen, Chlorine, and Bromine.—Shake 0.5 gm. of powdered iodine with 20 cc. of water, and filter. To 10 cc. of the filtrate, add, drop by drop, decinormal sodium thiosulphate solution until decolorized, then add a granule of ferrous sulphate, 1 drop of ferric chloride solution and 2 cc. of sodium hydroxide solution. Warm to about 60° C., and add 10 cc. of hydrochloric acid. The liquid should not acquire a blue color. Filter, and to 10 cc. of the filtrate add 1 cc. of ammonia water, 5 drops of silver nitrate solution, and again filter. On adding to the filtrate 2 cc. of nitric acid no precipitate, and not more than an opalescent turbidity, should develop. ... 

Cyanides. — On adding to 20 cc. of the 1 20 aqueous solution a granule of ferrous sulphate, 1 drop of ferric chloride solution, and 5 cc. of sodium hydroxide solution (sp. gr. 1.3), then heating the mixture to 50 to 60° C., and adding 10 cc. of hydrochloric acid, no blue color should develop. 

Proud flesh An exuberant growth of granulation tissue in a wound or ulcer. Prussian alkali See 84. Sodium hydroxide at a strength of 95 degrees. Prussian blue See ferric ferrocyanlde. 

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