74 THE BUREAU OF SCIENCE 



8. To determine the value of clays and shales for ceramic purposes. 



9. To determine the composition or formula of such manufactured prod- 

 ucts as electric batteries, paints, waterproofing compounds, etc. 



10. To determine the apparent and relative value of different kinds of 

 road materials, including clays, crushed stones, gravels, asphalts, oils, and 

 bitumens. 



11. To endeavor to find the cause of certain epidemics from waters which 

 apparently are potable. 



12. To detennine the cause of failure in materials of construction. 



13. To classify different samples of Babbitt metals and lubricants in their 

 true order of merit. 



14. To test and analyze the 19 different kinds of roofing materials 

 submitted in a recent contest for a substitute for nipa roofing and report on 

 their relative efficiency. In most instances it was necessary to devise 

 special methods of analysis in order to prove the correctness of the formulas 

 submitted by the contestants. 



The large amount of work accomplished by this division, hand- 

 icapped as it has been by such unavoidable conditions, is, in 

 itself, sufficient proof of the diligence and ability of Messrs. 

 Beyer, Gana, Dar Juan, Reyes, King, and Arguelles who at all 

 times did the work assigned to them in a very satisfactory and 

 painstaking manner and often worked overtime and on holidays 

 in order to keep up with the work. 



RESEARCH WORK 



The published research is included under the heading The 

 Philippine Journal of Science and other publications. 



Under my direction the study of the oxidation of coal, Philip- 

 pine soils, and the local manufacture of salt has been continued. 



Considerable work has been done by myself, Mr. W. C. Reibling, 

 chief of this division, and Mr. V. Q. Gana on a paper dealing 

 with the water supplies of the Philippine Islands. The com- 

 pleted publication will involve a great amount of work, only 

 about half of which has been done. The paper should be finished 

 as soon as possible, especially on account of the many important 

 considerations included. 



The subject of corrosion and protective coatings is a very 

 important one, and the necessity of a thorough investigation 

 along these lines is becoming more and more essential. Thou- 

 sands of dollars have been wasted through the rapid deterioration 

 of metallic structural materials and protective coatings. Many 

 of these apparently give very satisfactory services in other parts 

 of the world, but they deteriorate very rapidly here where the 

 climatic conditions are so different. We have segregated im- 

 portant references to the literature of the subject and sent 



