14 Carsten: Millable Cane 135 
a rule, a cane of such low purity will not come to the mills; 
however, I have seen cane come to the central the first mill 
juice of which was of 38 per cent purity. This was badly burned 
cane which had been left in the field for a month. When the 
sirup has a purity of 70 per cent, the first boiling is omitted 
and only the two-boiling system is employed. By washing we 
can then obtain a 96° sugar from the resulting massecuite. 
Generally, where the purity drops below 70 per cent, the masse- 
cuite will not produce a good 96° sugar and the product will 
have to be remelted which will require the use of extra pan 
capacity and entail extra cost. I have adopted as a basis the 
minima of 15° and 70 per cent, respectively, for Brix and purity. 
The available sugar in a ton of cane is then 6.97 per cent and 
it takes 14.35 tons of cane to make a ton of sugar. From the 
manufacturing standpoint alone such a cane can be handled; 
however, financially it may be undesirable to handle. In this 
connection the following items to be considered are enumerated: 
1. Cost of transportation per ton of cane. 
2. Cost of manufacture per ton of sugar. 
3. At lower rendement, extra cost for items 1 and 2. 
' 4, Overhead charges per day. 
5. Capacity of mill or tons of cane ground per day. 
Allowing a central or a plantation company a net profit of 40 
per cent over the cost of manufacture, I have worked all these 
items into the following formula: 
O 
AO a: 
; 
t= Cost of transportation per ton of cane. 
C= Cost of manufacture per ton of sugar. 
O= Overhead charges per day. 
Cap.= Capacity of mill or tons of cane ground per day. 
P= Net proceeds at marketing place of the sugar. 
In the formula, I have added 1.20 pesos to the manufacturing 
cost for every ton of cane over 10 required to make a ton of 
Sugar. The mean higher cost of manufacture comes to this fig- 
ure, calculated from actual data that I have on record. 
Assuming the following data: 
t= 50 centavos, 
C= 20 pesos, at 10 to 1, 
O= 300 pesos, 
Cap.—= 600 tons, 
P= 140 pesos per ton of sugar, 
