25 



It is well to again call attention to tlic ease with which massecuite obtained by the 

 alcohol process could be purged in the centrifugals, yielding a high polarization 

 sugar without the use of a wash. Massecuites by the ordinary process often con- 

 tained very flat crystals which would overlap one another and prevent the molasses 

 from passing off. 



EXPERIMENT NO. 3. ORDINARY AND ALCOHOL PROCESSES. 



Date : September 29, 1891. 



Variety and plats : Colman cane, plats 41 and 11. 



Gross cane (topped cane) tons. 



Trash.. ..do.. 



Clean cane do . 



Clean cane removed in samples do . 



Skimmings lost, calculated to clean cano do . 



Net clean cane worked . . . . do . 



22.445 

 4.330 



18. 115 

 .135 

 .510 



17. 470 



Mean weight of clean cane per cell pounds . . 324 



Trash, per cent topped cane 19.3 



Juice analyses. 



Exhausted chips. 

 Sucrose lost in the exhausted chips, per cent cane, 0.74 (mean of fifteen analyses). 



Sirups. 



The sirup was divided into equal parts, A and B. A was worked by the ordinary 

 and B by the alcohol process, as under experiment No. 2. The analysis of the sirup 

 is given in the table below : 



No analyses were made of the sirup after treatment, owing to a laboratory accident 

 which resulted in the loss of the sample. 



Filter-press cake. 



The following is the analysis of the filter-press cake : 



Total solids per cent . . 52. 3 



Sucrose do ... 19. 2 



Alcohol (absolute) do ... 14. 3 



Weight of press cake pounds. . 316 



The loss of sucrose in the press cake was 60.7 pounds and of alcohol 45.2 pounds. 

 Both these losses could easily be reduced by systematic washing of the press cake 

 with dilute alcohol. Neither of these losses is a serious matter if the press cake is to 

 be utilized in the manufacture of alcohol. 



