54 



I'KHSIDK-N riAi, ADHKI'LSS .-iiailUN A. 



4. Metallurgical (Iron and Steel) and Ceramic Industries. 



Chairman: Dr. J. E. Stead, F.R.S., of Middlesborough. 



5. Domestic Smoke Prevention (itiduding problems relative 



to domestic heating). Chairman: Mr. E. D. Simon, 

 of Manchester. 

 It is a question worthy of consideration whether this Asso- 

 ciation should not ofifer its co-operation in such important 

 matters. 



A company has laid down, in Natal, works now nearing 

 completion, for producing ammonia from coal with the object of 

 making ammonium sulphate. But no provision is made for the 



Dampfr-.. 



?• fb/mina 

 ^ Cemburtion 

 Chambtf: 

 Morizontal Section 

 A-B 



flTodin^ and 



Fic. 30. — Bettington Powdered Fuel I'.oiler. 



utilisation of the gases, which it is proftosed to waste, except in 

 so far as they are recjuired for tiring the boilers for the auxiliary 

 machinery, and may be available for doubtful new industries. 

 Surely internal combustion engines to utilise all waste gases, and 

 to drive electric generators for use in such electro-chemical 

 industries as the manufacture of calcium carbide, cyanamide 

 and its derivatives, might reasonably have been expected to form 

 ]>ari of such a scheme. The object of the works is to produce 

 ammonium sulphate, of which the world's production in 1914 

 was 1,365,700 tons. But in the newer process nitrogen, obtained 

 from liquefied air. may be directly combined with hydrogen under 



