70 Grave defects in our manufacturing processes. 



may perhaps be solved in quite an unexpected way, 

 possibly by the discovery of some substance capable 

 of precipitating ammonia and organic matter from 

 their solutions. 



Nearly all our manufacturing processes are full of 

 imperfections ; thus the loss of gas by a single large 

 provincial gas company, after that substance has left 

 the works, amounts to nearly one hundred and fifty 

 millions of cubic feet per annum, and to a value of 

 about 18,000; and the soil'of all our large cities and 

 towns is permeated and rendered foetid by coal gas. 

 And it has been stated by an eminent authority in such 

 matters that we might save 500,000 tons of coal a 

 year by economizing the waste heat of furnaces, by 

 purifying the coal, coking it, etc. In a single chemical 

 manufactory, out of about two thousand tons of hydro- 

 chloric acid used per annum, about eight hundred tons 

 have been allowed to flow away as a polluting sub- 

 stance, because it was not possible to utilise it. The 

 loss of material from a single large glass works equals 

 fourteen hundred tons per annum, and a value of 

 8,000. Similar grave defects might be pointed out 

 in nearly all our large manufactures, by those acquain- 

 ted with the subject. 



Inventions are wanted for quickening the process of 

 vinegar making, and diminishing the percentage of 

 loss of the acid. For bleaching discoloured fats. For 

 quickening the process of converting cast iron into 

 malleable iron. To easily separate nitrogen from the 

 oxygen of the atmosphere. To economically convert 



