ECONOMIC GEOLOGY OF THE BAGUIO DISTRICT. 



443 



In 1910 the total production of the distirct amounted to 95,960 

 pesos including a small amount won by the natives in the northern 

 part of the Province. 



NONMETALLIC MINEILVLS AND STRUCTURAL MATERIALS AND THEIR 

 ECONOMIC POSSIBILITIES. 



Limestone. — The gold fever has been so acute in this district that 

 very little attention has been given to the nonmetallic minerals available. 

 Our survey of the vicinity of Baguio has shown that good limestone 



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Fig. 2. — Aalborg kiln for lime burning. 



for building stone exists. It has been used in the Jesuit Observatory 

 located on Mount JMirador and promises to l)e very desirable. This 

 rock, also, on account of its comparative purity makes a very fine grade 

 of lime. There is more or less recrystallized calcium carbonate in 

 it which makes it all the more desirable for this purpose. 



The Jesuit fathers burned their lime in an ordinary dome-shaped 

 kiln, using limestone blocks. A better kiln for continuous work is 

 that given in the cut. (Fig. 2.) Favorable spots where lime might be 

 burned are indicated on the large map. 



