404 



THE AGRICULTURAL NEWS. 



Dbcembbb 18, 1915. 



SUGAR INDUSTRY. 



MUSCOVADO WORKS AND CENTRAL 



FACTORIES COMPARED 



In the review of i In- work done during ten years at 

 Gunth 5 Fai ity, Antigtoa, to which reference was 



made in the last issue of the Agricultural A* ws, il was shown 

 that during this period 50,474 tons f 96 sugai were made 

 from 177,668 tons oi cane, that is, 1 ton of sugar was 

 i valei it to 9' 16 tons oi cane. 



It will b ting to consider what would have been 

 the experience bad tl tanes been dealt with in fhe 



ivado factories formerly in existence, and what 



difference the manul icture ol the sugar in a i lern factory 



has made to the general output oi sugar from the island. 

 The data ire Lvailable to enable the comparison to be made. 



It, has been shown thai the work of the ordinary thi 

 roller mills, such as arc in use in the muscovado I ictories of 

 An ligun, is such that the megass coming from a mill doing 

 fairly good work, contains about L SO parts of juicefor 



1 ; while, from a mill doing indifferent 



work, the amouirt of juice rises to', 200 parts for each l" 11 ii 

 fibre. 



[nf rmation is available, as given in the following table, 

 .showing the composition of the canes dealt with in each of 

 the ten years and also the sugar content of the juice from the 

 first mill of the factory. This juice would lie very similar to 

 that expressed by the ordinary three-roller mill. 



Table 1. 



i in Sucrose in 



cane 

 per cent. 



15-3 



Year. 



14-1 



14 4 

 I t-3 



142 



147 

 I 1-1 

 1 I 2 

 12-9 



I.-;-:. 



Sucrose in 



first mill juice 



pi t cent. 



19-7 

 L8-3 

 1 8-5 

 L8-8 

 18-6 

 19-1 

 L8-5 

 l'.i-o 

 17-7 

 18-0 



The quantity of juice thai three roller mills, both 

 indifferent and fair, would be capable of extracting from canes 

 of the character hi re indicated, is given for each year in the 

 next table. 



It will be noticed that in the first four years under 

 consideration, the quantity oi fibre in the canes was slightly 

 ovi i 15 pi t oi nt., but thai alter this it tends to rise, until in 

 the last three years it ranges from 16*6 to 177. It is to be 

 remembered that these figures represent the average of each 

 s work: the maximum fibre content in each year has, 

 therefore, been considerably in excess of the figures now 

 given. 



The effeci of the fibre conti nl on the work ol small mills 

 is well brought out in the table. In the firsi four years it is 

 shown that the mills would extract from -"ii. 1 , to •>•">.', pet a nl 

 ofjui ling as the mill might be classed as good or 



1913, bowi ver, it is show n that the mills would only 

 be expected to give from about 12 percent, to IV, per cent. 

 ofjui 



Table showing the quantity of juice capable of 

 i iction by three roller mills. 



II. 



If these facts are considered in terms of Imperial 

 gallons of juice per tonof cane, it follows that in the first 



lour veins a poor mill would have given about 104 gallons of 

 juice per ton of cane, and a good one about 11<> to III 



gallons. [n the year 1913, a poor mill would have given 

 about 87 gallons, and a good one about !i I. Those accusl 

 to the work of muscovado factories will fully appreciate the 

 significance of these figui 



We may now consider what quantity of muscovado 



sugar would be expected as the yield from these canes, and 

 the quantity of cane it would hive taken to make a ton ,,f 

 muscovado sugar. In calculating the following results, it has 

 been assumed that 100 lb. of sugar in the juice will yield 

 SO ft), of dry muscovado sugar. 



Table III. 



HOOD Mil I .. 



P I Mll.l.. 



■ear. Sugar per Tons cane per Sugar per Tons can,, per 

 100 He ton sugar. 100 ft>. ton su 

 cane. cane. 



1 L-86 

 12-85 

 12-62 

 12-55 

 12-96 

 12-80 

 13-15 

 14-27 

 15-55 

 I 1-22 



From tin' above it is seen that while in the earlier years it 

 would have been possible to obtain about - v per cent, of mus- 

 covado sugarfroma g 1 rujll, and about 7.1 from irioorone 



in L913, agood mill WOUld have given only about 7 pei- rent. 



and a poor one about 6£. [f the facts are considered on the 



basis Of the* tons ol cane taken to make a ton of sugar, H e |i n ,| 



that a good mill in the irlier years would have taken about 12 i 



