A Few Popular Facts About Diffusion. 47 



drawbacks which would not exist in a well-arranged and 

 newly laid-out modern fa6lory, I consider that the fore- 

 going allowance of 10 cwts. coal per ton of ist sugars to 

 be excessive, rather than the reverse, and should with 

 good work and management be considerably reduced 

 below that figure ; and careful theoretical calculations, 

 based on the data and details of a6lual work, go to show 

 that in Demerara the coal account, under favourable 

 circumstances, should not, with diffusion, exceed 8 cwts. 

 coal per ton ist sugars made. This coal would be 

 expended, in conjun6lion with the chip fuel, about as 

 follows, viz., 40 per cent, would be used up in estab- 

 lishing and maintaining the juice throughout the entire 

 fa6lory at a temperature of 212 deg. Fahr. ; 38 per cent, 

 would be used in concentration from juice at 212 deg. 

 Fahr. to sugar ; 5 per cent, would be debited against the 

 manufaflure of molasses sugar, and the remainder, 17 

 per cent., would be absorbed by the various engines 

 throughout the fa6lory. 



The Diffusion Labour account, so far as the Factory 

 alone is concerned, would be increased from about $2*50 

 with mills, to about $4 per ton ist sugars made — but in 

 reference to this labour question it must be distinftly 

 borne in mind, that though the a6lual Fa6lory expenses 

 stand in the above ratio, still if the cost of manufaflure, 

 transportation, and cane-cutting be taken together, the 

 scale turns decidedly in favour of Diffusion. The field 

 and other expenses, whether calculated on the sugar or 

 cane, are of course all in favour of diffusion. A certain 

 sum has to be spent on the cultivation, cane-cutting, 

 transportation and establishment expenses, whatever 

 process of extra6lion may be in use at the Fa6lory ; and 



