THE CUBA REVIEW 



27 



Fig. 1. — Type of lime kiln often used in producing 

 lime and carbon dioxide for sugar factories. 



of this type. Where such an expenditure is not feasible or where lime only is desired and no 

 attention is paid to the carbon-dioxide gas, one of the more simple kilns wUl answer as weU. 



In choosing a fuel for the burning of lime it is desirable to select one giving a minimum of 

 ash and tarry matter. For this reason coke and gas are considered the very best. Second to 

 these comes a good grade of coal, but it is usually desirable to mL\ the coke and coal, where the 

 latter is employed to faciUtate the burning. In the simpler forms of kilns, wood is used as fuel. 



When lime is manufactured for use in the clarification of sugar-house products it is desirable 

 that a pure article be employed. The crude material from which this is derived is found in great 

 abundance in the various parts of the PhiUppine Islands. The usual form of tliis material used 

 in the native factories consists of sea shells and coral rock. Where this material is properly 

 selected and weathered for some time until the salt is washed away it will answer verysatis- 



factorily. 



The second form consists of sedimentary deposits such as those found m several parts of 

 the Archipelago, which are in the main quite pure. There are usuaUy found in all quarries 

 strata of material which are not of the purest type, but these may be carefuUy separated when 

 the rock has been broken up and transferred to the kiln . 



