246 VI. METALS.— Sub-salts. 



add solution of hydriodate of potash as long as any sediment falls, 

 wash and dry ; yellow ; used to make an ointment, tincture, and 

 pills; contains 1.5*5 iodine, with25quik; equiv. 40*5 This pre- 

 paration should be preserved in a well-stopped bottle, and kept 

 out of the solar hght. It is used for making the ointment of the 

 protoiodurets of mercury. There are pills also of the pro- 

 toioduret. 



Deutoiodide of quicksilver, Deutoiodure de mercure. Dis- 

 solve corros. sublim. 70 gr. in water ; dissolve also hydriodate of] 

 potash, 100 gr. in water ; mix the two solutions by degrees, filter, 

 wash and dry ; crimson, contains 31 iod. with 25 quik ; equiv. 5Q. 

 Used to make an ointment, tincture, and pills. 



COPPER. 



Green bice, Malachite^ Viride montanum optimum, Chryso' 

 coUa, Hemiprismatic habroneme-malachite, Green carh. of copper. 

 Composed of 10 perox copp. 75 carb. ac. and 1*25 water; equiv. 

 13-875. 



Copper green, Cendres hleiies cuivrees, Viride montanum 

 vulgare, Uncleavable staphi/linc-malachite, Dicarh. of copper ; — ' 

 Blue lice, Cceruleum montamim. Lapis Armenus prceparatuSy 

 Prismatic azure -malachite^ Blue carbonate of coj)per. Contains 

 15 carb. of copp. and 6*125 protohydrate of copper ; equiv. 21*625. 

 All are found in mines, and prepared, by grinding and washing, 

 for paints. 



Refiners'* verditer, Sander's blue, Cendres bleues, 

 Azurum cinereum. From the solution ofj copper obtained in pre- 

 cipitating silver from nitric acid by heating it with copper; this 

 solution is heated and poured upon whiting moistened with water ; 

 the mixture stirred for several hours every day, till the liquor 

 loses its colour, when it is poured off, and a fresh portion of the 

 solution poured on, until the proper colour is obtained. 



Verditer blue, Cendres bleues super/ins en pate. Solution of 

 blue vitriol at 35 deg. Baume, 240 pints; solution of muriate of 

 lime, at 40 deg. Baume, 180 pints; mix, decant the clear liquor, 

 and wash the sediment with the washings of a former operation at 

 8 or 10 deg. : add the first washings lo the clear muriate of copper, 

 until it begins to fall below 20 deg. Baume, the produce will be 

 about 670 pints. Mix lOOlb. of quicklime with 3001b. of water, 

 and add 7() to S5lb. of this lime cream to the muriate of copper ; 

 trying the liquor with ammonia-water whether it gives the proper 

 shade ; if too blue, more lime cream must be added : then wash 

 the green sediment, of which there will be about 5001b. ; saving 

 these washings. Dry a parcel of this sediment to find how much 

 dry material it will yield. To as much moist green paste as con- 



