FOURTEENTH ANNUAL REPORT 35 



results, and the Bureau of Science is investigating the efficiency 

 of various kinds of galvanized iron and the factors that affect 

 their corrosion and expects to carry the investigation at least far 

 enough to enable the Government to purchase all materials of 

 construction according to specified requirements that will guar- 

 antee satisfactory service. (See Standardization, p. 9.) New 

 methods of analysis and stripping of galvanized iron and tin 

 plate have been developed, some of which may have extensive 

 commercial application. 



In addition to the w^ork outlined on page 25 of my last report, 

 extensive investigations of paint materials and various protective 

 coatings for iron and steel and for metallic structures are being 

 planned and are in progress, the Bureau of Public Works cooper- 

 ating with both money and materials. The work will include a 

 study of the effect of various additions, chiefly Philippine oils, 

 to paint vehicles and an investigation of various types of rust- 

 inhibitive coatings, with a view toward finding the best protec- 

 tion for metals under tropical conditions. 



The publications of this laboratory are included under the 

 heading Philippine Journal of Science, Section A. (See p. 45.) 



The routine work of the laboratory has not changed materially 

 and is of the same general character as described last year. 



^DIVISION OF GENERAL, INORGANIC, AND PHYSICAL CHEMISTRY 



Personnel. — Mr. R, R. Williams, chief of the division, went 

 on leave in February and resigned, effective April 16, 1915, to 

 accept a position in the Bureau of Chemistry of the United 

 States Department of Agriculture, Washington, D. C. Mr. T. 

 Dar Juan was appointed chief analytical chemist on February 

 15, 1915. Mr. R. H. Aguilar was appointed on February 1, 

 1915. Mr. F. D. Reyes, who resigned on April 6, 1914, was 

 reinstated on November 1, 1915. Owing to an insufficient per- 

 sonnel to care for all of the work, employees, including a graduate 

 student of the University of the Philippines, were taken on as 

 temporary assistants at various times. Besides the research 

 work indicated above, the inorganic chemists have been busy 

 with the analysis of a large number of samples. Of these over 

 8,000 have been received and reported upon during the year. 

 For a period of several years before my appointment as Acting 

 Director and Director of the Bureau of Science I was in direct 

 charge of this work ; therefore the capabilities of each employee 

 are pretty accurately known to me. In view of this fact and the 

 necessity for economy, I decided not to appoint a regular chief 

 of division at present, but to keep in close personal touch with 



