32 



THE CUBA REVIEW 



CANE EXPERIMENT ON CUBAN SOIL IN SANTA CLARA 



Lbs. of cane Percent Lbs. of sugar 



Fertilizer Mixtures. per acre. sucrose in cane. per acre. 

 12% available Phos-acid.. . 1 



3% ammonia [ 53, 101 13 .8 7,328 



1% Potash J 



16% 



Fertilizer Mixtures. 

 'S% available Phos-acid. 



3% ammonia 



2% Potash 



Lbs. of cane 

 per acre. 



53, 582 



Per cent 

 sucrose in cane. 



13.7 



Lbs. of sugar 

 per acre. 



7,341 



13% 



300 lbs of the above mixtures were used per acre. 



COMPOSITION OF CUBAS 



The accompanying table presents the yearly averages of about 1,300, analyses of Cuban 

 centrifugal sugar as received at a sugar refinery during the past seventeen years. 



While these analyses cannot be held to represent absolutely the average composition of all 

 the centrifugal sugars produced in Cuba during the period referred to, they may still be taken 

 as a very close appoximation to the sugars produced on the Island. 



It is particularly interesting to note that the sugars have shown a gradual improvement in 

 purity, having risen about 1% degrees in polarization. This has been accompanied by a de- 

 crease in glucose and the organic matter of about one-half per cent each, while the ash has re- 

 mained pretty constant and the moisture has fallen off three or four-tenths of a per cent. 



The decrease in organic matter is a distinct aid in the refining of these sugars, and the de- 

 creased water improves their factor of safety against deterioration during storage. It is some- 

 what surprising that the ash content shows so little if any improvement, or, in fact, a slight 

 retrogession, in view of the rising polarization, and it is apparent that this point should receive 

 more decided attention by the raw sugar manufacturers. 



Average Analyses of Cuban Centrifugal Sugars. 



Polarization Glucose Water Ash Organic 



1901 94.00 1.88 1.74 .50 1.88 



1902 94.36 1.75 1.43 .58 1.88 



1903 95.09 1.22 1.59 .51 1.59 



1904 94.37 1.57 1.47 .56 2.08 



1905. 95.00 1.45 1.37 .60 1.58 



1906. 94.76 1.39 1.43 .67 1.75 



1907" 95.02 1.21 1.39 .67 1.71 



1908 ! 94.97 1.15 1.20 .69 1.99 



1909^^ 95.31 1.26 1.21 .59 1.63 



1910^^ 95.23 1.22 1.33 .66 1.56 



1911^'^ 95.57 I.IS 1.18 .68 1.39 



1912^^ 95.65 1.28 1.13 .58 1.36 



1913' 95.48 1.28 1.31 .60 1.33 



1914'^. 95.79 1.20 1.10 .61 1.30 



1915" 95.89 1.31 1.02 .56 1.22 



1916' 95.52 1.47 1.10 .67 1.24 



1917.'' 95.80 1.27 1.13 .54 1.26 



— Facts About Sugar. 



