53 STAT.] 76TH CONG. , 1 ST SESS.-CH. 248-JUNE 29, 1939 while observing tides or currents or tending seismographs, services of one tide observer in the District of Columbia at not to exceed $1 per day, and compensation, not otherwise appropriated for, of persons employed in the field work, for operation, maintenance, and repair of an airplane for photographic survey, and expenses incident to the exe- cution of field work xon approval by the head of the Bureau, to be expended in accordanct with the regulations relating to the Coast and Geodetic Survey subscribed by the Secretary of Commerce, and under the following heads: Field expenses, coastal surveys: For surveys and necessary resurveys of coasts on the Atlantic and Pacific Oceans and the Gulf of Mexico under the jurisdiction of the United States; continuing researches in physical hydrography relating to harbors and bars, and for tidal and current observations on the coasts of the United States or other coasts under the jurisdiction of the United States; compilation of the Coast Pilot, including the employment of pilots and nautical experts; the preparation or purchase of plans and specifications of vessels and the employment of hull draftsmen; the reimbursement, under rules pre- scribed by the Secretary of Commerce, of officers of the Coast and Geodetic Survey for food, clothing, medicines, and other supplies fur- nished for the temporary relief of distressed persons in remote locali- ties and to shipwrecked persons temporarily provided for by them, not to exceed a total of $500; actual necessary expenses of officers of the field force temporarily ordered to the office in the District of Columbia for consultation with the director, and not exceeding $3,000 for special surveys that may be required by the Bureau of Lighthouses or other proper authority, $348,000, of which amount not more than $21,200 may be expended for personal services in the District of Columbia. Magnetic and seismological work: For continuing magnetic and seismological observations and to establish meridian lines in connec- tion therewith in all parts of the United States; making magnetic and seismological observations in other regions under the jurisdiction of the United States; purchase of additional magnetic and seismo- logical instruments; lease of sites where necessary and the erection of temporary magnetic and seismological buildings; and including the employment in the field and office of such magnetic and seismo- logical observers, and instrument makers and stenographic services as may be necessary, $70,000. Federal, boundary, and State surveys: For continuing lines of exact levels between the Atlantic, Pacific, and Gulf coasts; determining geographic positions by triangulation and traverse for the control of Federal, State, boundary, county, city, and other surveys and engi- neering works in all parts of the United States; including special geodetic surveys of first-order triangulation and leveling in regions subject to earthquakes, not exceeding $10,000; determining field astro- nomic positions and the variation of latitude, including the mainte- nance and operation of the latitude observatories at Ukiah, California, and Gaithersburg, Maryland, not exceeding $2,500 each;establishing lines of exact levels, determining geographic positions by triangula- tion and traverse, and making astronomic observations in Alaska; and continuing gravity observations in the United States and for making such observations in regions under the jurisdiction of the United States and also on islands and coasts adjacent thereto, $80,000, of which amount not to exceed $35,440, may be expended for personal services in the District of Columbia. Vessels: For repair of vessels, and replacement of equipment thereon, exclusive of engineers' supplies and other ship chandlery, $70,000. Pay of officers and men on vessels: For all necessary employees to man and equip the vessels, including professional seamen serving as 915 Field expenses, coastal surveys. Post, p. 1312. Coast Pilot, com- pilation. Special surveys. Personal services. Magnetic and seis- mological work. Post, p. 1312. Federal, boundary, and State surveys. Ukiah and Gaith- ersburg observatories. Alaska. Vessels, repair, etc. Offiers and men on vessels, pay. Post, p. 1312 .
�
