gQ THE BUREAU OF SCIENCE 



ROUTINE WORK 



During the year 242 assays for private parties, including 2 

 free assays for prospectors in new districts, and 439 assays on 

 research work, besides 19 bullion assays were made. This shows 

 a slight increase over the number of assays made during the 

 previous year, which is surprising when one considers that in- 

 stallations of assay offices at the Colorado mine, Masbate, and 

 the Headwaters mine, Benguet, have been made, and also that 

 a number of quartz prospectors have transferred their attention 

 to placer deposits. At the present time, owing to the small 

 number of assays received, this Bureau is carrying on the work 

 at an actual loss of ?0.88 each. However, this seems warranted 

 when one considers the great service to prospectors and engineers 

 in enabling them to obtain accurate and reliable results. 



As heretofore, there has been a continued demand for the serv- 

 ices of the geologists to make field investigations on geological 

 or engineering problems of strictly economic value. All of the 

 investigations undertaken for private parties have been carried 

 on in order to discover the economic possibilities of various de- 

 posits and thereby to aid in advancing the mining industry. 



Geological reconnaissance work has been carried on in various 

 parts of the Archipelago. The geologists have not visited so 

 many places as formerly, but the work has been carried on in 

 a more intensive manner. Three large relief maps of the Phil- 

 ippine Islands, the stone work for 2 medium-sized lithograph 

 maps in three colors, 12 original maps, 21 tracings in ink, as 

 well as a number of free-hand drawings, arrangement of illus- 

 trations, etc., have been made by the artists. 



INVESTIGATIONS 



The Mineral Resources of the Philippine Islands for 1912 is 

 nearly ready for the press. It will contain the following articles : 



Review of the year, by Warren D. Smith. 

 Statistics of production, by F, A. Dalburg. 

 Status of mining claims, by F. A. Dalburg. 



THE METALS 



Gold: 



The Paracale district, by Paul R. Fanning. 



The Aroroy district, by Percy D. Kincaid. 



The Baguio district, by Warren D. Smith. 



Other districts, by Frank T. Eddingfield. 

 Iron: 



The Angat district, by F. A. Dalburg. 

 Other metals, by F. T. Eddingfield. 



