44 TiMEHRI. 



are obtained as fuel, you will find that pound for pound 

 these diffusion chips are quite as good, if not better fuel 

 than the single crushed megass used to be. These chips 

 are associated with about 56 per cent, to 58 per cent 

 moisture when they enter the furnaces, and often have a 

 temperature of 107 degrees Fahr., but their average 

 temperature appears to be about 96 degrees Fahr., 

 whilst the temperature of the heated air admitted to the 

 furnace grates, for the purposes of combustion, may be 

 set down as fully 170 degrees Fahr. These figures partly 

 account for the great value of the chips as fuel, their 

 average efficiency being i'j6 lbs. water evaporated per 

 pound chip fuel from and at 212 degrees Fahr. to mean 

 gauge pressure, and there have been several very care- 

 fully conduced Boiler Tests where this efficiency has 

 been as high rg lbs. water per pound of chip fuel. These 

 figures seem high ; but the recent adoption of a Beck's 

 Water Meter, which works and measures the water con- 

 tinuously day and night, as it is a6lually used in the 

 daily work of the Fa6lory, has confirmed the accuracy of 

 some twenty special boiler tests that have been conduced 

 at Nonpareil. We will say, however, that pra6lically, 

 you will in efife6l, with diffusion, get about ao per cent 

 less chip fuel for your megass boilers, on equal weights 

 of canes, than would have been the case when using the 

 single mill as a juice extra£\or. In addition to this loss 

 in original fuel, you will, with diffusion, have to cope 

 with the increased evaporation due to the greater ex- 

 traction of juice, and the added water of diffusion, which 

 has caused dilution of the original cane-juice, and through 

 the agency of which you have obtained the increased ex- 

 traction of sugar from the canes. Let us for a moment 



