274 VINEGAR, CIDER, AND FRUIT-WINES. 



aluminous salts, salts of the alkalies, which are inert in the uses 

 for which red liquor is manufactured. 



He recommends the following formulae : 



I. Ammonia alum, 453 pounds ; lead acetate, 379 ; water, 1132. 



II. Aluminium sulphate, 383 pounds ; lead acetate, 379 ; water, 

 1132. 



III. Alum, 453 pounds, and a quantity of solution of acetate of 

 lime, amounting to 158 pounds. 



IV. Aluminium sulphate, 333 pounds, with the same amount of 

 acetate of lime solution. 



On agitating the foregoing mixtures, decomposition takes place ; 

 sulphate of lead or of lime is thrown down and a sulphacetate 

 remains with an equivalent of ammonium sulphate from the am- 

 monia alum. 



In 1872, Messrs. Storck & Co., of Asnieres, France, patented 

 a process for the manufacture of aluminium acetate from the 

 phosphate. Aluminium phosphate is converted into acid phos- 

 phate by dissolving it in phosphoric acid. Soluble aluminium 

 acetate and insoluble lead sulphate are thus formed. The alum- 

 inium acetate is then separated by filtration, and subsequently 

 treated in a manner similar to that obtained for industrial pur- 

 poses by the double decomposition with aluminium sulphate. 

 The phosphate of lead is either used to produce pure phosphoric 

 acid by decomposing it by sulphuric acid, or sulphuretted hydro- 

 gen, or an alkaline phosphate is formed thereof by treating it 

 with an alkaline sulphide. It may likewise be used for the pro- 

 duction of phosphorus ; in this case it is mixed with charcoal and 

 subjected to distillation. 



Manganese acetate, Mn(C 2 H 3 O 2 ) 2 . This substance is prepared 

 by dissolving freshly precipitated manganous carbonate (MnCO 3 ) 

 in heated acetic acid, evaporating the solution and crystallizing. 

 The crystals are of the rhombic prism, and occasionally in plates 

 of an amethystine color; they are permanent in air, soluble in 

 alcohol, and in about three times their weight of water. 



On a large scale this salt is manufactured by precipitating a 

 solution of manganous sulphate* by one of lime acetate and 



* Manganous sulphate is prepared by mixing the dioxide (pyrolusite) with 

 half its weight of concentrated sulphuric acid and heating in a Hessian cru- 



