56 TiMEHRI. 



of these impurities which may be troubling us, and thus 

 there is a wide field open for future investigation. It 

 would seem that Phospho-Tungstic Acid is to be the 

 coming pra6lical clarifier in connexion with the afore- 

 mentioned evils, and as it can be produced cheaply, it is 

 to be hoped it will soon come to our assistance, either in 

 conjun6lion with lime, or as a substitute for that hitherto 

 indispensable clarifying agent. 



Finally, gentlemen, I believe we unduly prejudice 

 diffusion by our inaccurate methods of comparison. We 

 take a Laboratory press or mill and obtain a partial 

 sample of the original juice in the cane, say 75 0/0 of 

 the total juice in the cane, whereas to be accurate, this 

 extra6lion should be absolutely complete. We then 

 polarize this partial sample, and from the result of this 

 polarization proceed to estimate the total sugar in the 

 cane, at 12 0/0 fibre. This method is in error and makes 

 the losses in manufaflure appear greater than they 

 really are ; the total sugar in the cane sometimes figuring 

 out 3 to 3'5 0/0 in excess of the amount aftually con- 

 tained in the cane. With Triple Crushing, reliable 

 samples of juice, in exa6l accordance with the actual 

 extraction in vogue can be obtained, and their compari- 

 sons are thus fairly correct, and their work throughout 

 the Factory appears in its true light, and has the advan- 

 tage of diffusion in this respect — assuming a comparative 

 superiority to which it is not entitled. 



