93 



My nearest neighbor, Mr.-Bradish Johnson, obtained the past season 136 pounds of 

 sugar per ton of cane. We are within 3 miles of each other ; our land is much the 

 same ; our cultivation is substantially the same. It is fair to assume his cane was as 

 rich as mine, yet we had about 175 pounds of all sugar per ton, a difference of 39 

 pounds of sugar per ton on our mill-work, and about 71 pounds difference on the dif- 

 fusion work. Take his estate for illustration: 



His 10,000 tons of cane gave him 1,390,000 pounds of sugar. Had he worked his 

 crop by diffusion he would certainly have had 70 pounds more sugar to the ton of 

 cane. This would have increased his yield 700,000 pounds of sugar, which, at 5^ 

 cents per pound, would have given him $38,500 more for his crop than he received. 



Take my own crop of 13,300 tons of cane. Had I worked it by diffusion I would have 

 had 35 pounds more sugar per ton. This would have given me 465,000 pounds more 

 sugar than I obtained, an aggregate of 2,865,000 pounds of sugar from about 600 acres, 

 or 4,750 pounds per acre. The cash increase of my crop would have been, at 5-J cents 

 per pound, $25,592.50, a difference to Mr. Johnson of $3.85 per ton of cane, and to me, 

 on my crop, of $1.82| per ton of cane. 



QUANTITY OF JUICE DRAWN FROM EACH CELL. 



The caucused for diffusion was weighed and delivered, chiefly on cars, 

 to the cutter. The trash which becomes detached in handling the cane 

 was collected in carts and weighed, and its weight deducted from the 

 total. No account was taken of the trash which entered the cutter. 



It was found that the average weight of chips in each cell, when filled 

 in the ordinary manner, was 1,757 pounds. One cell filled with extra 

 care was weighed, and the weight found to be 1,860 pounds. It was 

 thus seen that by careful packing it was easy to get 100 pounds extra 

 weight of chips into each cell. 



The quantity of juice drawn from each cell varied from 900 to 1,000 

 liters, or from 2,059 to 2,288 pounds. 



The mean quantity of juice drawn for the first four runs was nearly 

 2,170 pounds. Assuming that in each 100 pounds of chips there is 90 

 per cent, of juice, we have in 1,757 pounds of chips 1,581.3 pounds of 

 normal juice. 



The quantity of diffusion juice from this was 2,170 pounds. The in- 

 crease over normal juice is therefore 589 pounds, or 37.2 per cent. In 

 the last run a much greater dilution was secured. In order to get a 

 slow current of the juice through the calorisators the master of diffusion 

 was instructed to begin filling the cell with juice when it was about half 

 full of chips. At the end of the run it was found that the introduction 

 of liquid had caused a floating of the chips, and that the weight of chips 

 in each cell has been greatly diminished. Thus a higher dilution of the 

 diffusion juice was secured than was intended. The very perfect ex- 

 haustion of the chips during the last run was partially secured by this 

 means. 



The mean weight of chips in each cell during the last run was 1,500 

 pounds; the, weight of normal juice 1,350 pounds, giving an iiicicasc of 

 QO per cent. This dilation is Creator than is nrrossarv for diffusion 



