46 TiMEHRI. 



rating plant by about the same percentage, it will be 

 theoretically sufficient, on the average, to meet the 

 requirements of the particular case now under consider- 

 ation ; but owing to the variation in the amount of 

 the dilution, during an entire crop, and the undoubted 

 advantage of having an evaporation rather in excess 

 of the average work, it would be prudent, and I believe 

 would pay, to make this increase of power up to 50 0/0 

 more than it used to be. 



Though the continuous work of diffusion throughout 

 the 24 hours, helps us in the matter of evaporation and 

 in reducing the number of additional coal boilers re- 

 quired, it unfortunately does not favourably affe6l the 

 fuel account — multiple effe6l evaporators alone can 

 assist us in this respeft ; and this increased fuel question 

 can be best pra6lically stated as follows — I speak from 

 a6lual Demerara records : 



In a well-arranged and well-balanced modern sugar 

 factory, where single crushing is the order of the day, 

 and where no rum is manufactured, you should be well 

 able comfortably to make sugar without the use of any 

 coal or wood whatever, save to start and close the 

 grinding. With diffusion at work in the same faClory, 

 after the required modifications and additions have been 

 made, you should not require more than 10 cwts. of coal 

 per ton of ist sugars made. At Nonpareil, over a crop 

 of nearly 4,000 tons of ist sugars, our coal account was 

 13*8 cwts. coal per ton of ist sugars made, and 128 

 cwts. coal per ton ist and 2nd sugars taken together, 

 all coal having been carefully weighed before use, 

 throughout the crop. As we are handicapped on this 

 estate by heterogenous amalgamations, and various 



