The Bureau of Science shall also maintain the Aquarium at Manila. [284-1; 1541-1.] SECTION  957 . Importation of Silkworms, Eggs, Cocoons, or Moths. — Silkworms, their eggs or cocoons, or the moths which produce silkworm eggs, shall not be imported into the Philippine Islands except by the Bureau of Science. SECTION  958 . Philippine Journal of Science. —  As a vehicle for the publication of original contributions to scientific knowledge, the Director of the Bureau of Science shall publish and circulate, by subscription or otherwise, a periodical to be known as t he Philippine Journal of Science. Weather Bureau SECTION  960 . Chief Officials of the Weather Bureau . — The Weather Bureau shall have one chief, three assistant chiefs, and one corresponding secretary, all appointed by the Governor-General and to be known respectively as the Director of the Weather Bureau , the Assistant Director of the Weather Bureau, the Chief of the Meteorological Division of the Weather Bureau, the Chief of the Astronomical Division of the Weather Bureau, and the Secretary of the Weather Bureau. [1407-11; 1416-1; 2319-1 (Weather Bur.).] S ECTION  961 . Designation of Assistant to Serve as Acting Chief.  — The Director of the Weather Bureau may, with the approval of the Secretary of the Interior, designate the Assistant Director, one of the chiefs of division or the secretary, who in the absen ce or disability of the Director, shall serve as Acting Director. [1407-11 ( a ).] SECTION  962 . Duties of the Director of Weather Bureau . — The Director shall maintain an efficient system of weather forecasts and storm warnings to be sent at his discretion to the commandants of the naval stations at Cavite and Olongapo, to the customhous e of Manila, to the public press, to all branch stations in telegraphic communication with the central office and to other persons who may ask for the warnings or be in particular need of them according to the judgment of the Director. When dangerous storm s threaten any portion of the Archipelago, telegraphic warnings shall be sent to the threatened districts, through the governors of the respective provinces, if there is no branch station of Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 290 CHAPTER  29