States

Production of Pumpkins and Squashes. (open access)

Production of Pumpkins and Squashes.

Describes the varieties of squashes and pumpkins, their many uses, the requirements for their growth, and proper storage practices.
Date: February 1940
Creator: Thompson, Ross C. (Ross Calvin), 1896-
Object Type: Book
System: The UNT Digital Library
Prevention of damage by the seed-corn maggot to potato seed pieces. (open access)

Prevention of damage by the seed-corn maggot to potato seed pieces.

Uses results from a scientific study to describe how to best protect potato seed pieces from damage by the seed-corn maggot.
Date: February 1940
Creator: Reid, W. J. (William John), 1902-; Wright, R. C. (Robert Claude), b. 1885. & Peacock, Walter M.
Object Type: Book
System: The UNT Digital Library
Methods and Equipment for Home Laundering. (open access)

Methods and Equipment for Home Laundering.

Guide to planning a laundry center at home. Describes various types of equipment and machinery available for washing, drying, and ironing. Describes the products used for laundering and the recommended laundering methods for specific fabric types.
Date: February 1940
Creator: O'Brien, Ruth, b. 1892 & Holbrook, Helen S. (Helen Shepard), b. 1882
Object Type: Pamphlet
System: The UNT Digital Library
An Investigation of Sheet-Stiffener Panels Subjected to Compression Loads With Particular Reference to Torsionally Weak Stiffeners (open access)

An Investigation of Sheet-Stiffener Panels Subjected to Compression Loads With Particular Reference to Torsionally Weak Stiffeners

"A total of 183 panel specimens of 24ST aluminum alloy with nominal thickness of 0.020, and 0.040 inch with extruded bulb-angle sections of 12 shapes spaced 4 and 5 inches as stiffeners were tested to obtain the buckling stress and the amplitude of the maximum wave when buckled. Bulb angles from 3 to 27 1/2 inches long were tested as pin-end columns. The experimental data are presented as stress-strain and column curves and in tabular form" (p. 1).
Date: February 1940
Creator: Dunn, Louis G.
Object Type: Report
System: The UNT Digital Library
Measurement of the Forces Acting on Gliders in Towed Flight (open access)

Measurement of the Forces Acting on Gliders in Towed Flight

"The magnitude, the direction, and the fluctuations of tow forces exerted upon gliders by towing them aloft behind an automobile were measured under a variety of conditions covering a range from gentle to severe types of operation. For these tests, the glider towing force did not exceed 1.6 of the gross weight of the glider. V-G records obtained during the towed-flight period as well as during the subsequent return glide to earth showed accelerations in the range from 3 to -1 g. The results of preliminary airplane tow tests are also presented" (p. 1).
Date: February 1940
Creator: Klemperer, W. B.
Object Type: Report
System: The UNT Digital Library
A new method of studying the flow of the water along the bottom of a model of a flying-boat hull (open access)

A new method of studying the flow of the water along the bottom of a model of a flying-boat hull

A new method of studying the flow of the water along the bottom of a model of a flying-boat hull is described. In this method, the model is fitted with a transparent bottom and is divided down the center line by a bulkhead. The flow is observed and photographed through one-half of the model by means of the diffused illumination from a battery of lamps contained in the other half of the model. Photographs of the flow, particularly of the changes that occur when the step ventilates, are shown. The results of the present investigation indicate that the method has considerable promise, chiefly in connection with motion-picture studies.
Date: February 1940
Creator: Ward, Kenneth E.
Object Type: Report
System: The UNT Digital Library
A Generalized Vortex Theory of the Screw Propeller and Its Application (open access)

A Generalized Vortex Theory of the Screw Propeller and Its Application

"The vortex theory as presented by the author in earlier papers has been extended to permit the solution of the following problems: (1) the investigation of the relation between thrusts and torque distribution and energy loss as given by the induction of helical vortex sheets and by the parasite drag; (2) the checking of the theorem of Betz of the rigidly behaving helical vortex sheet of minimum induced energy loss; (3) the extension of the theory of the screw propeller of minimum energy loss for the inclusion of parasite-drag distribution along the blades" (p. 1).
Date: February 1940
Creator: Reissner, Hans
Object Type: Report
System: The UNT Digital Library
Damping formulas and experimental values of damping in flutter models (open access)

Damping formulas and experimental values of damping in flutter models

The problem of determining values of structural damping for use in flutter calculations is discussed. The concept of equivalent viscous damping is reviewed and its relation to the structural damping coefficient g introduced in NACA Technical Report No. 685 is shown. The theory of normal modes is reviewed and a number of methods are described for separating the motions associated with different modes. Equations are developed for use in evaluating the damping parameters from experimental data. Experimental results of measurements of damping in several flutter models are presented.
Date: February 1940
Creator: Coleman, Robert P.
Object Type: Report
System: The UNT Digital Library
The Strength of Shell and Tubular Spar Wings (open access)

The Strength of Shell and Tubular Spar Wings

The report is a survey of the strength problems arising on shell and tubular spar wings. The treatment of the shell wing strength is primarily confined to those questions which concern the shell wing only; those pertaining to both shell wing and shell body together have already been treated in TM 838. The discussion of stress condition and compressive strength of shell wings and tubular spar wings is prefaced by several considerations concerning the spar and shell design of metal wings from the point of view of strength.
Date: February 1940
Creator: Ebner, H.
Object Type: Report
System: The UNT Digital Library
Theoretical and Experimental Investigations of the Drag of Installed Aircraft Radiators (open access)

Theoretical and Experimental Investigations of the Drag of Installed Aircraft Radiators

The present report proposes the determination of the absolute magnitude of the total radiator drag and, in addition, of the different causes of the radiator drag.
Date: February 1940
Creator: Barth, W.
Object Type: Report
System: The UNT Digital Library
Testing of High-Octane Fuels in the Single-Cylinder Airplane Engine (open access)

Testing of High-Octane Fuels in the Single-Cylinder Airplane Engine

"One of the most important properties of aviation fuels for spark-ignition engines is their knock rating. The CFR engine tests of fuels of 87 octane and above does not always correspond entirely to the actual behavior of these fuels in the airplane engine. A method is therefore developed which, in contrast to the octane number determination, permits a testing of the fuel under various temperatures and fuel mixture conditions. The following reference fuels were employed: 1) Primary fuels; isooctane and n-heptane; 2) Secondary fuels; pure benzene and synthetic benzine" (p. 1).
Date: February 1940
Creator: Seeber, Fritz
Object Type: Report
System: The UNT Digital Library
Experimental Contribution to the Study of Combustion in Compression-Ignition Engines (open access)

Experimental Contribution to the Study of Combustion in Compression-Ignition Engines

The purpose of this paper is to explain the differences in thermodynamic qualities of two oils and to try to make this differentiation clear enough so that it can be applied to two oils extremely alike, as, for instance a given oil and the same oil to which a small amount of another substance has been added.
Date: February 1940
Creator: Duchene, R.
Object Type: Report
System: The UNT Digital Library
Aerodynamics of Rotating-Wing Aircraft With Blade-Pitch Control (open access)

Aerodynamics of Rotating-Wing Aircraft With Blade-Pitch Control

"In the present report, with the aid of the usual computation methods, a rotor is investigated the pitch of whose blades is capable of being controlled in such a manner that it varies linearly with the flapping angle. To test the effect of this linkage on the aircraft performance, the theory is applied to an illustrative example" (p. 1).
Date: February 1940
Creator: Pflüger, A.
Object Type: Report
System: The UNT Digital Library
Wind-Tunnel Tests of the NACA 45-125 Airfoil: A Thick Airfoil for High-Speed Airplanes (open access)

Wind-Tunnel Tests of the NACA 45-125 Airfoil: A Thick Airfoil for High-Speed Airplanes

Report discussing an investigation of the pressure distribution, profile drag, and location of transition for a NACA 45-125 airfoil for the purpose of aiding in the development of a thick wing for high-speed airplanes. The critical speed, pressure distribution, and drag of the airfoil are detailed.
Date: February 1940
Creator: Delano, James B.
Object Type: Report
System: The UNT Digital Library
Experimental Determination of Exhaust Gas Thrust, Special Report (open access)

Experimental Determination of Exhaust Gas Thrust, Special Report

"This investigation presents the results of tests made on a radial engine to determine the thrust that can be obtained from the exhaust gas when discharged from separate stacks and when discharged from the collector ring with various discharge nozzles. The engine was provided with a propeller to absorb the power and was mounted on a test stand equipped with scales for measuring the thrust and engine torque. The results indicate that at full open throttle at sea level, for the engine tested, a gain in thrust horsepower of 18 percent using separate stacks, and 9.5 percent using a collector ring and discharge nozzle, can be expected at an air speed of 550 miles per hour" (p. 1).
Date: February 1940
Creator: Pinkel, Benjamin & Voss, Fred
Object Type: Report
System: The UNT Digital Library
Tensile Elastic Properties of Typical Stainless Steels and Nonferrous Metals as Affected by Plastic Deformation and by Heat Treatment (open access)

Tensile Elastic Properties of Typical Stainless Steels and Nonferrous Metals as Affected by Plastic Deformation and by Heat Treatment

A general discussion is given of the relationships between stress, strain, and permanent set. From stress-set curves are derived proof stresses based on five different percentages of permanent set. The influence of prior plastic extension on these values is illustrated and discussed. A discussion is given of the influence of work-hardening, rest interval, and internal stress on the form of the proof stress-extension curve.
Date: February 23, 1940
Creator: McAdam, D. J., Jr. & Mebs, R. W.
Object Type: Report
System: The UNT Digital Library
Flow coefficients of monosleeve valves (open access)

Flow coefficients of monosleeve valves

The flow coefficients of the intake and the exhaust ports of a sleeve-valve cylinder were measured by attaching the cylinder to a large tank and measuring the changes in pressure and temperature in the tank that were caused by short periods of air flow through the valve ports. The derivation of the equations on which the flow coefficients are based is given. The distribution of total pressure in the arms of the sleeve-valve intake manifold was measured. The arms are found to have as little as 75 percent of the total pressure within the manifold entrance.
Date: February 8, 1940
Creator: Waldron, C. D.
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: O-1436 (open access)

Texas Attorney General Opinion: O-1436

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Gerald Mann, regarding a legal question submitted for clarification: Liability of the State of Texas on the claim of E. L. Martin, Inc..
Date: February 15, 1940
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: O-584 (open access)

Texas Attorney General Opinion: O-584

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Gerald Mann, regarding a legal question submitted for clarification: Interpretation of various situations arising under House Bill 792, Acts of the 46th Legislature, 1939, appertaining to the liquefied petroleum gas industry in Texas
Date: February 19, 1940
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: O-1866 (open access)

Texas Attorney General Opinion: O-1866

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Gerald Mann, regarding a legal question submitted for clarification: Under Article 3899 would a constable compensated on a fee basis be entitled to deduct as an expense of office gasoline and oil and up-keep for his automobile for and during the year?
Date: February 24, 1940
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: O-1868 (open access)

Texas Attorney General Opinion: O-1868

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Gerald Mann, regarding a legal question submitted for clarification: Trial fees - Justices of the Peace - Article 1052, Code of Criminal Procedure.
Date: February 23, 1940
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: O-1869 (open access)

Texas Attorney General Opinion: O-1869

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Gerald Mann, regarding a legal question submitted for clarification: Expenses of Assistant District Attorney for the 72nd Judicial District of Texas.
Date: February 28, 1940
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: O-1888 (open access)

Texas Attorney General Opinion: O-1888

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Gerald Mann, regarding a legal question submitted for clarification: In serving process in tax suits within the county and in tax suits in another county, does the sheriff have legal authority to charge mileage traveled in serving such process, in addition to the fee of $1.00 for “out county” tax suits and $2.00 for “in county” tax suits?
Date: February 27, 1940
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: O-1892 (open access)

Texas Attorney General Opinion: O-1892

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Gerald Mann, regarding a legal question submitted for clarification: Is that portion of precinct 5, Milan County, which was taken from precinct 5 and added to precinct 1 prior to 1933 wet or dry?
Date: February 5, 1940
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History