Resource Type
Collection
Technical Report Archive and Image Library
153
National Advisory Committee for Aeronautics Collection
122
USDA Farmers' Bulletins
32
Government Documents A to Z Digitization Project
30
USGS Topographic Map Collection
12
Texas State Publications
8
Texas House of Representatives Journals
3
Texas Senate Journals
3
United States Experiment Station Record
3
Environmental Policy Collection
2
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NACA Technical Notes
44
NACA Technical Reports
32
Farmers' bulletin (United States. Dept. of Agriculture)
29
NACA Technical Memorandums
29
United States Bureau of Mines Reports
16
United States Geological Survey Reports
12
NACA Special Reports
9
Leaflet (United States. Department of Agriculture)
7
45th Legislature of Texas
6
U.S. Geological Survey bulletin
6
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229 Matching Results
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Growing Christmas holly on the farm.
Describes the characteristics of the holly tree, and ways to plant, cultivate, and sell it.
Date:
1937
Creator:
Coville, Perkins, 1898-
Object Type:
Book
System:
The UNT Digital Library
Excluding Birds From Reservoirs and Fishponds.
Describes methods of removing birds from sources of drinking water, such as fishponds and reservoirs.
Date:
March 1937
Creator:
McAtee, W. L. (Waldo Lee), 1883-1962 & Piper, Stanley E. (Stanley Edward)
Object Type:
Book
System:
The UNT Digital Library
FCC Reports, Volume 2, July 1, 1935 to June 30, 1936
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date:
1937
Creator:
United States. Federal Communications Commission.
Object Type:
Report
System:
The UNT Digital Library
When to Cut Rice.
Discusses effective timing for harvesting rice, taking into consideration milling quality, moisture content, and other factors.
Date:
December 1937
Creator:
Smith, W. D. (William Daniel), 1893- & Jones, Jenkin W. (Jenkin William), 1888-
Object Type:
Book
System:
The UNT Digital Library
Diseases of fur animals.
Describes the various types of disease which fur animals may contract, and provides suggestions for preventing or controlling these diseases.
Date:
July 1937
Creator:
Shillinger, Jacob Edward, 1890-
Object Type:
Book
System:
The UNT Digital Library
Planting and care of lawns.
Describes methods for establishing, maintaining, and protecting lawns; describes varieties of grasses recommended for planting in different regions of the United States.
Date:
1937
Creator:
Westover, H. L. (Harvey Leroy) & Enlow, C. R. (Charles Ranger), b. 1893.
Object Type:
Book
System:
The UNT Digital Library
Some Causes of Blow-Outs During Drilling and Means of Prevention: with Special Reference to the Gulf Coast Region
Report issued by the U.S. Bureau of Mines discussing the causes of blow-outs and crater formation during the drilling of high-pressure wells. Causes and prevention of well blow-outs are presented. This report includes tables.
Date:
March 1937
Creator:
Carpenter, Charles B.
Object Type:
Report
System:
The UNT Digital Library
Smelting Ores in the Electric Furnace
Report issued by the U.S. Bureau of Mines discussing the electric smelting of nonferrous ores. As stated in the introduction, "it is the purpose of the present paper to survey the technical and economic changes that have taken place and to determine whether electric smelting of nonferrous ores offers any more promise today than 20 years ago" (p. 1). This report includes tables, and illustrations.
Date:
October 1937
Creator:
Dean, Reginald S. & von Bernewitz, M. W.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Explosions in Ohio: 1874-1936
Report issued by the U.S. Bureau of Mines discussing coal mine explosions in Ohio between 1874 and 1936. The number of explosions and fatalities are presented. The causes of mine explosions are discussed as well. This report includes tables.
Date:
October 1937
Creator:
Owings, C. W.
Object Type:
Report
System:
The UNT Digital Library
Mineral Industries Survey of the United States: California, Kern County, Mojave District: The Golden Queen and other Mines of the Mojave District, California
Report issued by the U.S. Bureau of Mines discussing the mineral production of mines in Kern County, California. Mining and milling methods of these mines are presented. This report includes tables, maps, illustrations, and photographs.
Date:
January 1937
Creator:
Julihn, C. E. & Horton, F. W.
Object Type:
Report
System:
The UNT Digital Library
Contributions to the Data on Theoretical Metallurgy: [Part] 7. The Thermodynamic Properties of Sulphur and its Inorganic Compounds
Report issued by the Bureau of Mines discussing the thermodynamic properties of sulfur, and its inorganic compounds. As stated in the introduction, "the present bulletin has as its primary purpose the correlation of the thermodynamic properties of elementary sulfur and its inorganic compounds and the presentation, after careful consideration of all available information, of a self-consistent system of thermodynamic relationships for these substances" (p. 1). This report includes tables.
Date:
1937
Creator:
Kelley, K. K.
Object Type:
Report
System:
The UNT Digital Library
Ball-Mill Grinding
Report issued by the Bureau of Mines discussing the ball-mill grinding technique. Different methods of mill grinding are presented and compared with ball-mill grinding. This report includes tables, illustrations, and photographs.
Date:
1937
Creator:
Coghill, Will H. & DeVaney, Fred D.
Object Type:
Report
System:
The UNT Digital Library
Stability of Castering Wheels for Aircraft Landing Gears
"A theoretical study was made of the shimmy of castering wheels. The theory is based on the discovery of a phenomenon called kinematic shimmy. Experimental checks, use being made of a model having low-pressure tires, are reported and the applicability of the results to full scale is discussed. Theoretical methods of estimating the spindle viscous damping and the spindle solid friction necessary to avoid shimmy are given. A new method of avoiding shimmy -- lateral freedom -- is introduced" (p. 147).
Date:
August 11, 1937
Creator:
Kantrowitz, Arthur
Object Type:
Report
System:
The UNT Digital Library
General Airplane Performance
"Equations have been developed for the analysis of the performance of the ideal airplane, leading to an approximate physical interpretation of the performance problem. The basic sea-level airplane parameters have been generalized to altitude parameters and a new parameter has been introduced and physically interpreted. The performance analysis for actual airplanes has been obtained in terms of the equivalent ideal airplane in order that the charts developed for use in practical calculations will for the most part apply to any type of engine-propeller combination and system of control, the only additional material required consisting of the actual engine and propeller curves for propulsion unit" (p. 241).
Date:
June 1, 1937
Creator:
Rockfeller, W. C.
Object Type:
Report
System:
The UNT Digital Library
The Scale Effect in Towing Tests With Airplane-Float Systems
"The present report includes a description of the making of three-component measurements on a full-size float mounted on an actual airplane and the comparison of the results with those from two models of the same form but of different size which had been tested in the towing tank. The purpose of the comparison is to determine the effect of the Reynolds Number on the results of model tank tests. Following a brief discussion of previous tests intended to elucidate the problem of scale effect on float systems and a description of the testing equipment, the choice of the reference quantities to be used in the comparison is discussed" (p. 1).
Date:
May 1937
Creator:
Schmidt, Rudolph
Object Type:
Report
System:
The UNT Digital Library
The Source of Propeller Noise
A two blade propeller of 40 cm diameter and zero pitch was explored for its noise development; it could be whirled up to 17,000 rpm - i.e., a tip speed of 355 meters/second. To obtain the power loss N(sub m) of the propeller for comparison with the produced acoustical power N(sub A) the engine performance characteristics were measured with and without propeller. The result is the sought-for relation c, that is, curve c' after correction with the engine efficiency.
Date:
May 1937
Creator:
Ernsthausen, W.
Object Type:
Report
System:
The UNT Digital Library
The Photoelastic Investigation of Three-Dimensional Stress and Strain Conditions
The present report contains the description and typical application of two photoelastic methods which are suitable for the study of stress and strain conditions in three dimensions, namely: the fixation method and the immersion method.
Date:
April 1937
Creator:
Oppel, G.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of the problem of surface roughness
Based on the universal laws of turbulent velocity distribution at rough and smooth walls, there is in the present work presented a method that allows surface roughness tests and in particular, measurements on the roughness of ship surfaces to be carried out in a much simpler manner. The types of roughness investigated were in the form of flat, rough plates installed in a square-section rectangular channel, the other three walls always being smooth. Twenty-one plates of various roughness were investigated, the roughness elements being the following: spheres of diameter 0.41 and 0.21, respectively, spherical segments, cones, and "short" and "long" angles.
Date:
April 1937
Creator:
Schlichting, H.
Object Type:
Report
System:
The UNT Digital Library
Turbulent Boundary Layer of an Airfoil
A need has arisen for a new determination of the velocity profiles in the boundary layer. Assuming that the character of the velocity distribution depends to a large extent on the character of the shear distribution across the boundary layer, we shall consider the nature of the shear distribution for a boundary layer with a pressure gradient.
Date:
April 1937
Creator:
Fediaevsky, K.
Object Type:
Report
System:
The UNT Digital Library
On the Actual Loads on Airplane Landing Gears
This investigation was intended to throw light on a number of problems: 1) obtain a time history of the force acting on the gear wheels during take-off and landing runs; 2) obtain the time history of the direction of this force (magnitude of its three components along the coordinate axes); 3) derive conclusions as to the design load factors. In connection with the latter, of special interest was the solution of such problems as: a) the dynamic loads in the three main landing attitudes; b) the problem of the true direction of the forces for each of the three "pure" types of landing; c) combination of the above types; d) the comparison for each of the chassis members of the computed force (according to the design standards) with the actual force measured in the tests so as to determine the actual factors of safety.
Date:
March 1937
Creator:
Shiskin, S.
Object Type:
Report
System:
The UNT Digital Library
Some Experiments on the Slipstream Effect
The models designated "Torino 30, 31, 32" are horizontal tail surfaces of rectangular, triangular, and elliptical plan form and all of the same profile section. Tests were carried out with the object being to determine the effect of the propeller slipstream on the aerodynamical characteristics of the horizontal stabilizer. The results presented correspond to a first series of tests made without an interposed wing and in which the distance between the plane of the propeller disk and the tail was maintained constant.
Date:
March 1937
Creator:
Ferrari, C.
Object Type:
Report
System:
The UNT Digital Library
Experimental Apparatus for the Study of Propellers
The apparatus consists of a universal balance with transmission at variable speeds from 300 to 5,000 rpm and a group directly coupled to the model for speeds of 5 to 30,000 revolutions. This new apparatus was also designed with a torsion meter for measuring the torque. Tests were conducted on the effect of the angle between the propeller axis and the wind direction. The results presented correspond to a first series of tests made without an interposed wing and in which the distance between the plane of the propeller disk and the tail was maintained constant.
Date:
March 1937
Creator:
Panetti, M.
Object Type:
Report
System:
The UNT Digital Library
Valve-Spring Surge
Test equipment is described that includes a system of three quartz indicators whereby three different pressures could be synchronized and simultaneously recorded on a single oscillogram. This equipment was used to test the reliction of waves at ends of valve spring, the dynamical stress of the valve spring for a single lift of the valve, and measurement of the curve of the cam tested. Other tests included simultaneous recording of the stress at both ends of the spring, spring oscillation during a single lift as a function of speed, computation of amplitude of oscillation for a single lift by harmonic analysis, effect of cam profile, the setting up of resonance, and forced spring oscillation with damping.
Date:
March 1937
Creator:
Marti, Willy
Object Type:
Report
System:
The UNT Digital Library
The stress distribution in shell bodies and wings as an equilibrium problem
This report treats the stress distribution in shell-shaped airplane components (fuselage, wings) as an equilibrium problem; it includes both cylindrical and non-cylindrical shells. In particular, it treats the stress distribution at the point of stress application and at cut-out points.
Date:
February 1937
Creator:
Wagner, H.
Object Type:
Report
System:
The UNT Digital Library