256 VI. METALS.— Salts. 



Persitlphate of iron, Tritosulfate de fer^ Pet'sesquisulphate 

 of iron. Calcine copperas in the open air, moistening it with a 

 small quantity of nitric acid : wash the powder, and keep the red 

 solution as a test for prussic acid, gallic acid, and boletic acid. 



Vitriol calcined wuitj^, ^Vitrioleicm ad albedinem calcinatum^ 

 Sulphas ferri exsiccatum, Sulphas ferri exsiccatus. Green vitriol 

 heated in an unglazed pot, or spread upon the top of a furnace, 

 or in a sunny place, until it is white, and grows red at the edges ; 

 astringent, drying. 



Ferrum tartarizatum. Rub iron filings lib., with cream 

 of tartar 21b., and water lib. ; expose to the air for a week, dry, 

 powder; add water lib., expose again to the air for a week, dry, 

 and powder. 



Tartarum ferri. Carbonas ferri (or rust of iron) 1 oz., 

 cream of tartar, 2oz., water lib. ; boil, filter, cool, filter again, 

 evaporate to a pellicle, cool ; it will form a saline mass, which is 

 to be powdered : tonic and diuretic, gr. x — 3ss. 



Liquor ferri alkalini. Iron 3ijss, dissolve in spirit of 

 nitre 3ij, distilled water jvj ; add by degrees aqua subcarb. pot. 

 Jvj; let it stand, and pour off the clear: these are tonic and 

 emmenagogue, 3ss — 3J» bis terve die. 



Tinctura martis Glauberi. Iron filings, crude tartar, 

 ana lb. iij, boil in water lb. xxxvj to 2 gall. ; filter while hot, and 

 evaporate to lb. v ; tonic, emmenagogue, and deobstruent. 



Acetas ferri. Protoxide of iron 3iv, distilled vinegar 5iij ; 

 dissolve and strain : tonic, astringent. 



Iron liquor, Acetate of iron. Leave old iron in a cask of 

 vinegar or sour beer. 



2. Leave old iron in rectified pyroligneous acid at 3 deg. 

 Baume, for three oi; four days, or till it comes to 10 deg. ; then 

 draw off and evaporate the solution to 14 deg. : the tar deposited 

 on the remaining iron may be burned off whenever it hinders the 

 solution. 



3. Mix a solution of acetate lime with a sol. of copperas. 

 Used in dyeing black and browns. 



Ens Martis, Flores salts ammoniaci Martialis, Flores Mar- 

 tiales, Murias aminonicB et ferri. By subliming with a quick 

 sudden heat sal ammoniac, rubbed with twice its weight of iron 

 filings or colcothar, and repeating the sublimation with fresh salt, 

 as long as the flowers are well coloured. 



Ferrum ammoniatum, P. L. since 1819. Subcarbonate of 

 iron Ib.j, dissolve in muriatic acid Ib.j; evaporate to dryness, 

 add sal ammoniac Ib.j, and sublime. 



2. Dissolve iron in spirit of salt, and water and sal ammoniac. 



