[916-4; 1407-7 ( b ).] [156-3.] [916-4; 1407-7 ( b ).] ( i ) The conduct of investigations into the quality, composition, or properties of articles of food and drink; of gums, resins, drugs, herbs, oils, and other plant products; of soils and fertilizers; of cement and other construction and commercial materials ; and of the minerals and minero-medicinal waters of the Philippine Islands. (j) The gathering and dissemination of useful information concerning the mineral wealth and other natural resources of the Philippine Islands; the inculcation of knowledge concerning the best methods of utilizing such resources; and the encouragement of Ph ilippine industries generally. ( k ) The care of the scientific division of the Philippine Library, which shall be housed in the Bureau of Science. SECTION  947 . Ethnology of Non-Christian Peoples. —  The ethnological investigations conducted by the Bureau of Science with reference to the non-Christian peoples shall take account of the name of each tribe, the limits of the territory which it occupies, t he approximate number of individuals which compose it, their social organizations and their languages, beliefs, manners, and customs, with special view to determining the most practicable means for bringing about their advancement in civilization and mater ial prosperity. [Comp., 1055.] SECTION  948 . Ethnological Work to be Done Upon Request of Other Bureau. —  The head of any Department of the Insular Government may, through the Secretary of the Interior, call upon the Director of the Bureau of Science to make investigation, through the et hnological staff, concerning any matters referring to the inhabitants of the Philippines upon which information may be needed. [253-1; 841-1; 1407-23 ( b ); Comp., 1056.] SECTION  949 . Special Laboratories — Accomplishment of Work for Other Bureaus. —  The Bureau of Science shall maintain laboratories respectively devoted to biology, chemistry, and the manufacture of serums, in which shall be conducted all Government work app ropriate to their several functions, whether 287 Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011