CHEMICAL COMPOSITION OF MAIZE GRAIN 635 



should either be a few feet apart or, if adjoining, a fire-proof chap. 

 party-wall should divide them. Xln - 



The selection of the most suitable and economical form of 

 motive power depends greatly on the location of the mill and 

 an abundant supply of good water. If it is near the coal- 

 fields a steam-plant is generally preferred, but this must be of 

 the very latest type of construction ; it should include a com- 

 pound condensing engine worked with superheated steam of 

 120 to 150 lbs. boiler-pressure, and with feed-water heating 

 apparatus, if it is to be as economical as a suction gas engine 

 and plant of the latest type, such as "The National Gas 

 Engine ". 1 



In some of the large centres, such as Capetown, Johannes- 

 burg, and Durban, electric motors have been adopted, but they 

 are only practicable where the current can be obtained at a 

 price under one penny per unit. 



The selection of the best milling machinery is probably the 

 most difficult task confronting the purchaser of a new plant, 

 as there are five or six first-class English milling engineers 

 represented in South Africa - who turn out machines which 

 are not surpassed in design, results, economy of power, and 

 durability. Apart from any favourite make or design of 

 machine, the point which appeals most to the practical miller 

 is the best "flow sheet" which the engineer can supply, as 

 this is really where the results and the profits come in. It in- 

 variably follows that the best machines and the best " flow 

 sheet " go together, for the engineer who recognizes the im- 

 portance of keeping his machines strictly up-to-date, and 

 perhaps a little ahead of his competitors' machines, is wide- 

 awake enough to engage the services of the most competent 

 milling expert (who prepares the diagrams for the mill) whom 

 money can employ. 



1 For which Messrs. Stewarts & Lloyds are the agents in South Africa; they 

 also supply an apparatus for producing steam from the waste heat of the exhaust 

 gases, which is necessary for the steaming-worm, gelatinizers, and dryers of the 

 mill. Mr. Horsfall speaks highly, from his own practical experience, of the 

 economy in fuel and general running of this make of engine. The "Lister" 

 petrol engine, for which the Agricultural Supply Association, Ltd., Johannes- 

 burg, is the South African agent, is also highly spoken of by those who have 

 used it. 



2 In addition to Messrs. Samuelson and Messrs. Barron, Messrs. Henry 

 Simon, Ltd., of Manchester, and Messrs. E. R. & F. Turner, Ltd., of Ipswich, 



supply milling machinery to South Africa, 



