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Natural History of the Tres Marías Islands, Mexico

Description: Brief description of the Tres Marías Islands, Mexico, including mammals, birds, reptiles, crustacea, and plants found there.
Date: April 29, 1899
Creator: Nelson, E. W.; Stejneger, Leonhard; Rathbun, Mary J. & Rose, J. N.
Partner: UNT Libraries Government Documents Department
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To Establish Glacier National Park in Montana, Report

Description: This report contains a recommendation by the Committee on Public Lands to pass Senate bill 5648 which proposes the creation of Glacier National Park in Montana. It includes letters of the Secretary of Interior and the Secretary of Agriculture in relation to the proposed bill, in addition to a map of the proposed boundaries and photographs of scenic landmarks.
Date: April 29, 1908
Creator: United States. Congress. Senate. Committee on Public Lands
Partner: UNT Libraries Government Documents Department
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Revision of the Mice of the American Genus Peromyscus

Description: From letter of transmittal: "The work consists of a systematic study of all the members of the genus, and includes keys for the identification of the various forms, together with the necessary illustrations, and maps showing the geographic distribution of the species."
Date: April 17, 1909
Creator: Osgood, Wilfred H.
Partner: UNT Libraries Government Documents Department
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A Systematic Synopsis of the Muskrats

Description: From introduction: "Systematic account of the genus Fiber through study of over 1,000 specimens, chiefly well-prepared skins, accompanied by skulls, together with many odd skulls and skeletons."
Date: April 29, 1911
Creator: Hollister, N.
Partner: UNT Libraries Government Documents Department
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Methods of Preventing and Limiting Explosions in Coal Mines

Description: Technical paper issued by the Bureau of Mines over safety prevention in coal mines. Preventing mine explosions is emphasized. Methods used in mine safety are discussed. This paper includes tables, illustrations, and photographs.
Date: April 1915
Creator: Rice, George S. & Jones, L. M.
Partner: UNT Libraries Government Documents Department
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Revision of the American Marmots

Description: Discusses history, nomenclature, common names, habits, external characters, and specimens of American marmots. Describes, lists locations, and provides a key to species and subspecies.
Date: April 7, 1915
Creator: Howell, Arthur H.
Partner: UNT Libraries Government Documents Department
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Temperature-Viscosity Relations in the Ternary System CaO-Al₂O₃-SiO₂

Description: Technical paper issued by the Bureau of Mines over studies on the relations of temperature-viscosity. The "observations on the temperature-viscosity relations of silicates" (p. 5) are presented and discussed. This report includes tables, and illustrations.
Date: April 1918
Creator: Feild, Alexander L. & Royster, P. H.
Partner: UNT Libraries Government Documents Department
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Educational Agencies in Mining Communities

Description: Report on the importance of industrial education in the mining sector. It explains general education and facilities for specialized education for proficiency in a given field.
Date: April 1920
Creator: Read, T. T.
Partner: UNT Libraries Government Documents Department
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Notes on Longitudinal Stability and Balance

Description: Report detailing studies of longitudinal stability and balance on five airplanes: the JN4H, DH4, VE7, USAC-11, and Martin Transport. The methods of measurement, methods of correcting instability, and potential modifications for the elevator of the planes is described.
Date: April 1920
Creator: Warner, E. P.
Partner: UNT Libraries Government Documents Department
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The Coupling of Engines

Description: This report examines the idea of coupling numerous engines together to turn a single propeller, which the author feels would free aircraft design from the problems of multi-engine and propeller design.
Date: April 1921
Creator: Boccaccio, Paul
Partner: UNT Libraries Government Documents Department
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Extracts from the German Technical Process. Transport Airplanes.

Description: Report presenting a description of the transition stage of airplanes and how it will change with new developments in aircraft design. The details of the debate between centralized or decentralized installation are also provided, including some of the pros and cons of each.
Date: April 1921
Creator: Rohrbach, A. K.
Partner: UNT Libraries Government Documents Department
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Gordon Bennett Airplane Cup 1920

Description: The characteristics of the airplanes built for the Gordon Bennett Airplane Cup race that took place on September 28, 1920 are described. The airplanes are discussed from a aerodynamical point of view, with a number of new details concerning the French machines. Also discussed is the regulation of future races. The author argues that there should be no limitations on the power of the aircraft engines. He reasons that in the present state of things, liberty with regard to engine power does not lead to a search for the most powerful engine, but for one which is reliable and light, thus leading to progress.
Date: April 1921
Creator: Margoulis, W.
Partner: UNT Libraries Government Documents Department
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On the Definition of the Standard Atmosphere

Description: "On April 15, 1920, the under Secretary of State for Aeronautics and Aerial Transport decided to adopt as Standard Atmosphere for official airplane tests in France, the atmosphere defined by the following law, known as the Law of the S.T.You.(Technical Section of Aeronautics): From 0 to 11,000 m. - 0=15-0.0065 Z and above 11,000 m. - 0= -56.5 degrees being the temperature in centigrade degrees at altitude Z expressed in meters. For altitude 0 the pressure is 760 mm of mercury. In the magazine "L'Aeronautique" Mr. A. Toussaint has already written at length on the first studies which led to the elaboration of this law. Since that time the results obtained have been confirmed by fuller and more abundant data which have justified the official adoption of the Law of the S.T.Ae" (p. 1).
Date: April 1921
Creator: Grimault, P.
Partner: UNT Libraries Government Documents Department
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On the Resistance of the Air at High Speeds and on the Automatic Rotation of Projectiles

Description: Here, the laws governing the flow of a compressible fluid through an opening in a thin wall are applied to the resistance of the air at high speeds, especially as applied to the automatic rotation of projectiles. The instability which we observe in projectiles shot into the air without being given a moment of rotation about their axis of symmetry, or without stabilizing planes, is a phenomenon of automatic rotation. It is noted that we can prevent this phenomenon of automatic rotation by bringing the center of gravity sufficiently near one end, or by fitting the projectile with stabilizing planes or a tail.
Date: April 1921
Creator: Riabouchinski, D.
Partner: UNT Libraries Government Documents Department
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Recent European Developments in Helicopters

Description: Descriptions are given of two captured helicopters, one driven by electric power, the other by a gasoline engine. An account is given of flight tests of the gasoline powered vehicle. After 15 successful flight tests, the gasoline powered vehicle crashed due to the insufficient thrust. Also discussed here are the applications of helicopters for military observations, for meteorological work, and for carrying radio antennas.
Date: April 1921
Partner: UNT Libraries Government Documents Department
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Resume of the Theory of Naval and Aerial Propulsive Propellers and of Airplanes in the Rectilinear Flight

Description: Though dissimilar, these two subjects have been united because they have some points in common. The computation of the movement of an airplane can only be correctly established if we are in a position to know exactly the thrust and resisting torque of the propeller for the various values of slip, which may vary greatly according to circumstance. The first part of the work concerns propellers and introduces as a fundamental variable, the true slip (delta) with respect to the effective pitch, which is the advance per revolution of the propeller corresponding to no thrust. The second part deals with characteristic curves of an airplane.
Date: April 1921
Creator: Rateau, A.
Partner: UNT Libraries Government Documents Department
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Similitude tests on wing sections

Description: Report presenting an exploration of the application of model test results to full size construction, which assumes that either the resistance varies as the square of the speed within, the range of speeds in question or that the mechanical similarity law is fulfilled by the model test. The latter requires that the relation of airflow to the model be exactly like that for the large machine.
Date: April 1921
Creator: Kumbruch, H. & Bacon, D. L.
Partner: UNT Libraries Government Documents Department
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Some New Tests at the Gottingen Laboratory

Description: The tests at the Gottingen laboratory included: friction tests on a surface treated with emaillite, verification tests on the M.V.A. 356 wing, and comparative tests of wing no. 36 at the Eiffel laboratory. The examination of all these experiments leads to the belief that, at large incidences, the speeds registered by the suction manometer of the testing chamber of the Eiffel laboratory wind tunnel are, owing to pressure drop, greater than the actual speeds. Therefore, the values of k(sub x) and k(sub y) measured at the Eiffel laboratory at large incidences are too low.
Date: April 1921
Partner: UNT Libraries Government Documents Department
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Study of the Resistance Offered by Propellers Rotating on an Airstream

Description: This report presents a series of tests conducted to verify the formula for thrust P = q(exp 2) D(exp 2) V(exp 2), where P represents thrust, V the velocity of the airstream, D the diameter of the propeller, and q the lifting quality of a comparative propeller which is called the conjugate propeller.
Date: April 1921
Creator: Lame, M.
Partner: UNT Libraries Government Documents Department
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The Technical Development of the Transport airplane: Report of the Aero-Technical Conference of the Scientific Association for Aeronautics, March 5, 1919

Description: The abolition of military qualifications gives free scope to new technical possibilities in the development of transport airplanes. This report notes the various considerations that must be made when designing aircraft to meet the needs of commercial passengers. Comfort and safety must be emphasized.
Date: April 1921
Partner: UNT Libraries Government Documents Department
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Fire Tests of Building Columns

Description: Technical paper issued by the Bureau of Mines over studies conducted on fire resistance on building columns. As stated in the introduction, "the purpose of this investigation is to ascertain (1) the ultimate resistance against fire, of protected and unprotected columns as used in the interior of buildings; (2) their resistance against impact and sudden cooling from hose streams when in a highly heated condition" (p. 12). This paper includes tables, illustrations.
Date: April 21, 1921
Creator: Ingberg, S. H.; Griffin, H. K.; Robinson, W. C. & Wilson, R. E.
Partner: UNT Libraries Government Documents Department
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