A Few Popular Facts About Diffusion. 51 



estate's proprietor ere6ling a new faftory I should most 

 certainly establish diffusion in preference to either Single 

 or Double Crushing. In the latter case even if the 

 extraftion with mills be steadily maintained at 74 0/0 

 throughout the crop, which is most unlikely, diffusion, 

 with less effort, can give you fully 14 0/0 better extrac- 

 tion. Average double crushing, in this colony, over a 

 large crop, tends to an average extra6lion much nearer 

 68 0/0 than 74 0/0 — and a further benefit gained with 

 diffusion lies in the fa6l that with dry, sweet canes, it 

 tells to greatest advantage. 



In i8go, we made a triple range of experiments, as 

 follows : — On the 25th and 26th April, canes were sliced, 

 and the chips so obtained, ground by double crushing, 

 without the intervention of diffusion, so as to see whether 

 the slicing of the canes previous to crushing would pro- 

 mote a greater extra6lion of juice with mills. On the 

 28thj 29th, and 30th of April, and ist, 2nd, and 3rd 

 May, a run of diffusion, pure and simple, was made 

 without a hitch ; and on the 5th and 6th May, a trial 

 was made of the old-time system of double-crushing with 

 two powerful cane-mills. 



The extraftion from 100 parts canes was :— 



Milling Chips. Diffusion. Double Crushing. 



59'4 0/0 84*96 0/0 74 0/0 



The extraction from 100 parts juice, at 12 0/0 fibre 



was; — 



67*5 0/0 96*54 0/0 88"io 0/0 



The loss in the megass or chips, i.c^ loss of sugar 



was: — 



23-54 0/0 3-45 0/0 17-40 0/0 



Although the above trial gave with double crushing 

 the high extraftion of 74 per cent, juice on the weight 



G2 



