ing its publications of current value. No monthly list of publications is issued. The Division of Publications of the Department of Commerce issues such a list, which includes, of course, the publications of this bureau.

An

Indexes to publications.-An index of Commerce Reports is published quarterly. The price of the index to Commerce Reports is 20 cents a year. index to the Supplements to Commerce Reports is published annually. No general index of the bureau's publications has been issued.

Mailing lists.-Copies of the bureau's publications are furnished free to the press, public libraries, and commercial organizations, when special requests are made. No general mailing list for all publications is maintained. Correspondence.-General inquiries concerning the bureau's publications should be addressed to the Bureau of Foreign and Domestic Commerce, Washington, D. C.

BUREAU OF STANDARDS.

Principal administrative officials.-Director, Bureau of Standards, Chief Physicist, Chief Chemist, Physicists, Secretary, Superintendent of Mechanical Plant.

General information and duties.-The functions of the Bureau of Standards is as follows: (a) The custody of the standards; (b) the comparison of the standards used in scientific investigations, engineering, manufacturing, commerce, and educational institutions with the standards adopted or recognized by the Government; (c) the construction. when necessary, of standards, their multiples and subdivisions; (d) the testing and calibration of standard measuring apparatus; (e) the solution of problems which arise in connection with standards; (f) the determination of physical constants and properties of materials, when such data are of great importance to scientific or manufacturing interests and are not to be obtained of sufficient accuracy elsewhere; (g) formation of standards for public utility service; (h) testing structural and other materials; (i) technologic researches; and other investigations as authorized by Congress.

The bureau is authorized to exercise its functions for the Government of the United States, for any State or municipal government within the United States, or for any scientific society, educational institution, firm, corporation, or individual within the United States engaged in manufacturing or other pursuits requiring the use of standards or standard measuring instruments. For all comparisons, calibrations, tests, or investigations, except those performed for the Government of the United States or State governments, a reasonable fee will be charged.

General publications.—Material is issued on the following topics: Acidimetry (standard); Alloy, metallurgy, research; Analysis (standard methods); Anemometers; Appliances (specifications); Axles, and other railroad materials; Balances and scales; Barometer testing; Brasses and bronzes (research); Calorimetry; Capacity measurements; Cement testing and research; Cement (standard specifications); Chemical analysis; Chemical properties of materials; Clay and clay products (testing); Color standards; Colorimetry; Columns, steel (testing); Combustion samples for calorimetry; Conductivity of structural materials; Constants (standards of physical); Density and hydrometer measurements; Electric cells (standard); Electric current testing; Electric meter measurement; Electrical conductivity of materials; Electrical lamps, Electrical measurements; Electrical practice standards, Electrical properties of materials; Electrical resistance measurements; Electrical standards and instruments; Electrical service standards; Electrolysis; Engineering instruments; Engineering materials (testing and research); Expansion of materials; Failures of metals (causes); Fire resisting properties of materials; Gas meter testing; Gas service standards; Gasoline standards (testing and research); Geodetic metal tapes (test of); Girders, steel (testing); Glass testing and research; Heat conductivity of materials; Heat measurements; Heat measuring instruments (testing); Heat standards; Hygrometry and density measurements; Inspection of weights and measures; Interference of light; Inks (testing and research); Instruments (engineering); Investigation of miscellaneous materials; Lamps (electrical); Length measurements; Light (interference); Light (standards); Light waves (measurements); Lime and stucco testing and research; Lubricating oils (testing and research); Magnetic testing; Magnetooptics; Mass measurements; Measurements (standards); Measurements of capacity, length, time, etc.; Mechanical standards of performance; Melting

point standards for thermometry; Metal tapes, surveyors' (testing); Metals and paper (testing and research); Metals (properties); Metals (causes of failure); Meter, electric, instrument force; Meter, gas (testing); Materials (testing and investigation); Materials, structural (testing and research); Metric system of weights and measures; Metallurgy alloy research; Oils, lubricating (testing and research); Optical instruments and standards; Optical materials; Optical properties of materials; Optical standards (constants and data); Optics (magneto); Oxidimetry (standards); Paper (testing and research); Performance (standards); Photometry; Photomicrography; Physical constants (standards); Polarimetry; Pressure gages; Pressure measurements; Properties of materials and metals; Phyrometry; Quality, standards (testing and research); Radiation (loss); Radiometry; Railroad materials (investigation); Rails (technology); Refrigeration; Research work with materials and metals; Resistance (measurements of electrical); Saccharimetry; Samplers, standard (analysis); Scales and balances; Silver voltometer; Specifications and tolerances for measuring apparatus; Specifications for materials; Speedometers; Standard methods of analysis; Standards for materials (testing and research); Standards of quality (testing and research); Standards of measurements; Standards of oxidimetry; Stone (testing and research); Stucco (testing and research); Sugar analysis; Sugar standard polarization for polarimetry; Surveyors and geodetic metal tapes; Steel columns (testing); Steel girders (testing); Structural materials (testing and research); Structural steel column tests; Tapes (surveyors' and geodetic); Testing and research of various materials; Testing gas meters; Testing miscellaneous materials; Testing watches; Textiles (testing and research); Thermal properties of materials; Thermometry (heat measurements); Thermopiles; Time measuring (instruments); Tolerances and specifications for measuring apparatus; Voltameter (silver); Watch testing; Weights and measures; Weights and weighing instruments.

Method of distribution.—Publications of the Bureau of Standards are distributed free of charge so long as the stock for free distribution is available. When a publication of this bureau is no longer available for free distribution, copies may be obtained by addressing the Superintendent of Documents, Washington, D. C., who will advise the writer concerning the prices of such papers, and supply same on receipt of the proper remittance.

Annual and other periodical publications.-An annual report is printed each year giving activities of the Bureau of Standards. Free on application.

List of publications.-A list of publications of the Bureau of Standards is available for free distribution and will be sent on receipt of request. No monthly list of new publications is published by this bureau, but such a list is included in the monthly announcement list of the Department of Commerce. These publications are identified by initial of series and serial number, e. g., "S 309" means serial No. 309 of the Scientific Papers.

Indexes to publications.-The Bureau of Standards has had one general index known as the "Decennial Index" (the first ten years. 1904–1914), which is for the Bulletins (i. e., Scientific Papers) only. This index is still available for free distribution.

Mailing lists.-A mailing list for public libraries and certain university libraries is maintained by the bureau. Some mailing lists classified according to the different classes of specialists of work carried on at the Bureau of Standards are also at present being maintained.

Maps and charts.-The Bureau of Standards issues a Metric System Chart which illustrates graphically the comparison between the English and the metric systems of weight and measure. This chart is sent free of charge to schools, commercial organizations, and other institutions on application being made to this bureau.

Correspondence. All requests for publications should be addressed simply Director, Bureau of Standards, Washington, D. C.

BUREAU OF FISHERIES.

Principal administrative officials.-Commissioner; Deputy Commissioner; Assistants in Charge of Divisions: Office, Inquiry Respecting Food Fishes, Fish Culture, Statistics and Methods; Architect and Engineer; Accountant.

General information and duties.-The work of the Bureau of Fisheries comprises (1) the propagation of useful food fishes, including lobsters, oysters, and cther shellfish, and their distribution to suitable waters; (2) the inquiry into

the causes of decrease of food fishes in the lakes, rivers, and coast waters of the United States, the study of the waters of the coast and interior in the interest of fish culture, and the investigation of the fishing grounds of the Atlantic, Gulf, and Pacific coasts, with the view of determining their food resources and the development of the commercial fisheries; (3) the collection and compilation of the statistics of the fisheries and the study of their methods and relations; (4) the administration of the salmon fisheries of Alaska, the fur-seal herd on the Pribilof Islands, and the fur-bearing animals of Alaska.

General publications.— (a) Special reports in the form of octavo pamphlets, and (b) bulletins in the form of royal octavo pamphlets, embracing the following general subjects: Fish culture, fish-cultural methods and practices, fishery industries and methods, shellfish, Alaska fisheries, aquatic biology, morphology and physiology of aquatic animals, marine and fresh-water explorations, disense and parasites of fishes, etc. The special reports are the usual medium for publication of practical and economic subjects, and the bulletins of scientific and technical matters. These reports and bulletins are respectively grouped as annual series, and title pages and tables of contents are furnished to those who wish to bind them.

(c) Economic circulars which contain brief advance reports of investigations of economic importance or brief statements of information of timely significance not requiring more extensive treatment. These circulars are octavo leaflets, with independent serial numbers.

(d) Special statistical bulletins on various fishery industries issued as occasion demands or as investigations or canvasses are completed. These bulletins are single sheets, with independent serial numbers.

Method of distribution of general publications.-All publications of the bureau have heretofore been distributed free, but hereafter they will be sent out through the Superintendent of Documents, who will make a charge therefor. The free distribution of documents is now restricted to institutions exchanging with or cooperating with the bureau, and foreign and State fishery officials.

Annual and other periodical publications.-(a) The Annual Report of the Commissioner of Fisheries to the Secretary of Commerce. A brief administrative record of the year's activities.

(b) The Annual Report of the Distribution of Fish and Fish Eggs. A record of the fish hatched and rescued and eggs obtained and the disposition of same. (c) Alaska Fisheries and Fur Industries. An annual record of the work of the bureau in this field, covering (1) the enforcement of the law and regulations having to do with the protection and conservation of the fisheries and operation of hatcheries; (2) administration of the American fur-seal herd of the North Pacific Ocean; and (3) the enforcement of the law for the protection of the fur-bearing animals generally.

(d) Service Bulletin, an octavo leaflet with independent serial numbers, issued monthly. It contains information of the general activities of the bureau during the preceding month, and serves as a medium of communication between the administrative offices and all employees.

List of publications.-A list of those available for distribution is published. No monthly list is issued.

Inderes to publications.-There is an indexed list of publications from February, 1871, to February, 1896, now out of print.

Correspondence.-Official communications should be addressed to the Commissioner of Fisheries, Washington, D. C.

BUREAU OF LIGHTHOUSES.

Principal administrative officials.-Commissioner, Deputy Commissioner, Chief Constructing Engineer, Baltimore, Md., Superintendent of Naval Construction, Chief Clerk.

General information and duties.-The United States Lighthouse Service is charged with the establishment and maintenance of aids to navigation, and with all equipment and work incident thereto, on the sea and lake coasts of the United States, and on the rivers of the United States so far as specifically anthorized by law, and on the coasts of all other territory under the jurisdiction of the United States, with the exception of the Philippine Islands and Panama. The bureau publishes Light Lists and Buoy Lists, giving information regarding all aids to navigation maintained by the Lighthouse Service; it also publishes each week, jointly with the Coast and Geodetic Survey, Notices to Mariners, giving the changes in lights, buoys, etc.

General publications.—(a) Useful Information Concerning Aids to Navigation. A card that shows selected types of buoys, and gives general information relative to buoy colors, numbers, and shapes; day beacons, buoy lists, protection of aids, defects in aids, and distances of visibility for objects of various elevations above sea level. Free distribution.

(b) Lighthouse Service. 4 pages. Gives historical sketch and general description of the United States Lighthouse Service. Free distribution. (c) Whitewash and Cement-wash Formulas. Free distribution.

(d) The United States Lighthouse Service, 1915. 94 pages, illustrated. Furnishes general information regarding the organization and operation of the United States Lighthouse Service. Copies may be obtained from the Superintendent of Documents, Government Printing Office, Washington, D. C., at 15 cents per copy.

(e) Medical Handbook for the Use of Lighthouse Vessels and Stations. 116 pages. Prepared for the benefit of officers and employees of the Lighthouse Service whose duty on vessels and at remote stations may render it difficult at times for them to obtain necessary medical assistance or advice. Explains the treatment of a few of the commoner diseases, and contains a supplement on "First Aid to the Injured." Copies may be obtained from the Superintendent of Documents, Government Printing Office, Washington, D. C., at 50 cents per copy.

(f) Regulations for Lighting Bridges over Navigable Waters; also for Lights on Sheer Booms, Piers, Dams, and Similar Obstructions to Navigation, 1915.

Annual publications.—(a) Annual Report of the Commissioner of Lighthouses, submitted annually to the Secretary of Commerce, reporting the operations of the United States Lighthouse Service for the fiscal year ended June 30. Free distribution. Mailing list maintained.

(b) Light List, Atlantic and Gulf Coasts of the United States, coast of Porto Rico, etc.

(c) Light List, Pacific Coast of the United States, and on the coasts of Alaska, the Hawaiian, Midway, Guam, and Samoan Islands; and also aids to navigation maintained by the Canadian Government on the coast of British Columbia.

(d) Light Lists, Great Lakes, United States and Canada. On the Great Lakes, the St. Lawrence River above St. Regis River, and on Lakes Memphremagog and Champlain.

(e) Light List, Thirteenth Lighthouse District. Upper part of the Mississippi (above Cairo, Ill.), the Illinois, Missouri, Minnesota, Gasconade, and Osage Rivers, St. Croix River and Lake, and Lake Traverse.

(f) Light List, Fourteenth Lighthouse District. On the Ohio, Tennessee, Kanawha, and Monongahela Rivers.

(g) Light List, Fifteenth Lighthouse District. On the Mississippi River below mouth of the Missouri River and above New Orleans, and on the Red River.

Biennial publications.—(a) Buoy List, First Lighthouse District. Maine and New Hampshire.

(b) Buoy List, Second Lighthouse District. Massachusetts, excepting Mount Hope Bay and Taunton River. (c) Buoy List, Third Lighthouse District. Between the entrances to Narragansett and Delaware Bays, also the aids on Lakes Champlain and Memphremagog.

(d) Buoy List, Fourth Lighthouse District. Delaware Bay and River. (e) Buoy List, Fifth Lighthouse District. Coast and tributary tidal waters of Delaware, Maryland, Virginia, and North Carolina from, but does not include, Fenwick Island Light Station, Delaware, to New River Inlet, North Carolina.

(f) Buoy List, Sixth Lighthouse District. North Carolina, South Carolina, Georgia, and Florida from New River Inlet, North Carolina, to Hillsboro Inlet Light Station, Florida.

(g) Buoy List, Seventh Lighthouse District. Florida and on other waters tributary to the sea and gulf from a point just south of Hillsboro Inlet Light Station, Florida, to and including Cedar Keys, Florida.

(h) Buoy List, Eighth Lighthouse District. The Gulf Coast of the United States, and tidal waters tributary to the Gulf, from, but not including, Cedar Keys, Florida. to the Rio Grande.

(i) Buoy List, Ninth Lighthouse District. Porto Rico and adjacent Islands, and Guantanamo Bay, Cuba,

(j) Buoy List, Tenth Lighthouse District. Lake Erie, Lake Ontario, and the St. Lawrence River above the mouth of the St. Regis River.

(k) Buoy List, Eleventh Lighthouse District. Lakes St. Clair, Huron, and Superior, and the Detroit, St. Clair, and St. Marys Rivers.

(1) Buoy List, Twelfth Lighthouse District. Lake Michigan and Green Bay. (m) Buoy List, Sixteenth Lighthouse District. Alaska.

(n) Buoy List, Seventeenth Lighthouse District. Oregon and Washington. (0) Buoy List, Eighteenth Lighthouse District. California.

(p) Buoy List, Nineteenth Lighthouse District. Hawaiian, Midway, Guam, and the American Samoan Islands.

Weekly publications.-Notice to Mariners (issued jointly with Coast and Geodetic Survey), gives prompt notice of changes in aids to navigation and of obstructions or changes in channels which are to be noted on charts and light and buoy lists.

Method of distribution.—A copy of any Light List, Buoy List, or Notice to Mariners will be sent free of charge to any shipmaster or pilot upon application. Mailing lists of the Light and Buoy Lists, and Notice to Mariners are maintained.

List of publications.-A list of publications of the bureau, available for distribution, is published semiannually by the division of publications of the department.

Correspondence.-Requests for free publications or to have names placed on mailing lists should be addressed to the Chief, Division of Publications, Department of Commerce, Washington, D. C.

COAST AND GEODETIC SURVEY.

Principal administrative officials. Superintendent; Assistant Superintendent; Hydrographic and Geodetic Engineer in Charge of Office; Chiefs of Divisions: Geodesy, Hydrography and Topography, Charts, Terrestrial Magnetism, Ac

counts.

General information and duties.-The Coast and Geodetic Survey is charged with the survey of the coasts of the United States and coasts under the jurisdiction thereof and the publication of charts covering said coasts. This includes (a) base measure, triangulation, topography, and hydrography along said coasts; (b) the survey of rivers to the head of tidewater or ship navigation; (c) deep-sea soundings, temperature, and current observations along said coasts and throughout the Gulf and Japan streams; (d) magnetic observations and researches, and the publication of maps showing the variations of terrestrial magnetism; (e) gravity research; (f) determination of heights; (g) the determination of geographic positions by astronomic observations for latitude, longitude and azimuth, and by triangulation, to furnish reference points for State surveys; (h) the preparation and publication of sailing directions, and tide tables for all of the coasts under the jurisdiction of the United States.

The results obtained are published in annual reports and in special publications; charts upon various scales, including sailing charts, general charts of the coast, and harbor charts; tide tables issued annually in advance; Coast Pilots, with sailing directions covering the navigable waters; Notices to Mariners published jointly by Coast and Geodetic Survey and Bureau of Lighthouses), issued weekly and containing current information necessary for safe navigation; catalogues of charts and publications; and such other special publications as may be required to carry out the organic law governing the survey. General publications.-Publications are issued on following subjects: Astronomy; Azimuth; Azimuth of Polaris (tables); Bars (base); Base lines; Charts; Coast line; Coast pilots; Coastwise navigation; Coasts; Compass variation; Currents; Deep-sea soundings; Deflection of plumb line; Depth of compensation; Depths; Diurnal variation; Double zenith distances; Earth form; Earth flattening; Earthquakes; Elevations; Elongation and culmination of polaris (times of); Figure of the earth; Geoid; Geodesy; Geodetic astronomy; Geographic positions; Gravity; Harbors; Hydrography; Inland navigation; Inside route pilots; Interferometer; Invar leveling rods; Invar tapes; Isoclinic chart; Isogonic chart; Isostasy; Isostatic compensation; Latitude; Least squares; Leveling; Longitude; Magnetic charts; Magnetic declination; Magnetic dip; Magnetic disturbances; Magnetic horizontal intensity; Magnetic inclination; Magnetle measurements (directions); Magnetic observations (results); Magnetic observatories; Magnetic stations (descriptions); Magnetic survey of the United States: Magnetic tables; Magnetic vertical intensity; Maps; Map projections; 37882-188