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449
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20,461 Matching Results
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Some New Tests at the Gottingen Laboratory
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
Creator:
unknown
System:
The UNT Digital Library
Study of the Resistance Offered by Propellers Rotating on an Airstream
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.
System:
The UNT Digital Library
The Technical Development of the Transport airplane: Report of the Aero-Technical Conference of the Scientific Association for Aeronautics, March 5, 1919
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
Creator:
unknown
System:
The UNT Digital Library
Educational Agencies in Mining Communities
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, Thomas Thornton, 1880-1947
System:
The UNT Digital Library
Notes on Longitudinal Stability and Balance
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.
System:
The UNT Digital Library
Temperature-Viscosity Relations in the Ternary System CaO-Al₂O₃-SiO₂
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.
System:
The UNT Digital Library
Revision of the American Marmots
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.
System:
The UNT Digital Library
Methods of Preventing and Limiting Explosions in Coal Mines
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.
System:
The UNT Digital Library
Hydraulic Mine Filling: Its Use in the Pennsylvania Anthracite Fields, A Preliminary Report
Report issued by the Bureau of Mines over studies conducted on hydraulic mine filling. The different uses of this type of mine filling are discussed. This report includes tables, and illustrations.
Date:
April 1913
Creator:
Enzian, Charles
System:
The UNT Digital Library
A Systematic Synopsis of the Muskrats
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.
System:
The UNT Digital Library
Revision of the Mice of the American Genus Peromyscus
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.
System:
The UNT Digital Library
To Establish Glacier National Park in Montana, Report
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
System:
The UNT Digital Library
Natural History of the Tres Marías Islands, Mexico
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.
System:
The UNT Digital Library