372 



Soluble in Acids. 



Soluble in Water after 

 exposure as the former. 



Peroxide of Iron 2.500 



Protoxide of Iron 100 



Oxide of Manganese 240 



Free Alumina 1.420 



Carbonate of Lime 068 



Carbonate of Magnesia , 034 



. Phosphate of Lime and Iron 023 



( Sulphate of Lime 0045 



Soluble Potash .. .0024 



Chloride of Sodium 0030 



Soluble Silica 0022 



^ Humate of Lime trace 



Loss 



99.6931 

 .3069 



100.0000 



The ReVo W. Thorp intimated that from Barnsley to 

 Ferrybridge, out of 450 acres of clover, about 200 failed ; 

 that it usually fell from November to March ; and that from 

 observations which he had made by a common microscope, 

 the stalk becomes soft, dark coloured, or brown, like the 

 disease in the potato plant. 



After remarks from Mr. West, Mr. Lu€AS took the chair 

 for the purpose of allowing Mr. West to read his Paper : — 



ON WATER FOR STEAM ENGINES I ITS CHEMICAL ANALYSIS, 

 AND SOME PROPOSED REMEDIES FOR INCRUSTATIONS 

 IN BOILERS. BY WILLIAM WEST, ESQ., F.R.S., V.P., 

 LEEDS. 



When locomotive engines, in consequence of the splendid 

 invention of the tubular boiler, were first extensively applied 

 to railways, it seems as if engineers had been content to rest 

 upon a very obvious truism, — water is water ; and, omitting 

 all inquiry as to quality^ had been satisfied with securing a 

 sufficient quantity at each watering station. That this con- 

 tinued to be the case on some lines for several years, I know. 



In one of the instances in which I was at a later period 

 employed to analyse and report upon many springs proposed 

 as substitutes for water which had been found very mis- 



