HENRY DEACON 175 



fication of alkaline lyes, by the addition of 

 protoxide of iron to such lyes at a temperature 

 not exceeding 130 Fahrenheit. Separating 

 at a temperature under 130 the precipitate 

 obtained, and then decanting off the alkaline 

 solution, and lastly using the precipitated 

 sulphides by roasting them with an alkaline 

 chloride to obtain an alkaline sulphate. 



No. 352. Feb. 9th, 1860. Taken out by 

 Henry Deacon and Thomas Robinson 

 (Robinson, of Robinson and Cooks, engineers, 

 St. Helens, and of Hargreaves and Robinson, 

 of Widnes). It was for the use of a cupola 

 or separate combustion chamber, and blasted 

 air, in combination with any decomposing 

 apparatus, reverberatory or other furnaces 

 used in the manufacture of soda, for the 

 purpose of decomposing the salt or salt cake, 

 roasting the salt cake, making the black ash, 

 and evaporating, or finishing, or calcining. 



No. 1030. loth April, 1862. In the 

 ordinary manufacture of caustic soda the 

 caustic liquors are evaporated, and during 

 evaporation the salts precipitated are re- 

 moved, and evaporation is continued until the 

 residual liquors become so concentrated as to 

 solidify on cooling, or until so much of the 

 water is driven off as is required. The 



