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The Meaning of Specifications for Gasoline and Kerosene

Description: Report on how to identify good gasoline and kerosene, written for the average citizen, with an explanation of purchaser and supplier relationships.
Date: November 1926
Creator: Kraemer, A. J.
Partner: UNT Libraries Government Documents Department

First experiences with the rotating laboratory

Description: This report describes experiences with a rotating cylinder to explore the effects of motion and flow upon human sensory organs. One observation was that the variation of the resultant line of gravity (from gravity and centrifugal force) was not felt so strongly as might be expected. The impressions produced by the physical effects on the members of the body, especially the ones caused by the deflecting force (Coriolis force), are exactly what the laws of physics would lead us to expect, although somewhat surprising when observed in one's own body.
Date: July 1926
Creator: Prandtl, L.
Partner: UNT Libraries Government Documents Department

The fundamental principles of high-speed semi-diesel engines. Part 1: a general discussion of the subject of fuel injection in diesel engines and detailed descriptions of many types of injection nozzles

Description: Three questions relating to the technical progress in the utilization of heavy oils are discussed. The first question considers solid injection in high-speed automobile engines, the second concerns the development of the hot-bulb engine, and the third question relates to the need for a more thorough investigation of the processes on which the formatation of combustible, rapidly-burning mixtures depend.
Date: April 1926
Creator: Büchner
Partner: UNT Libraries Government Documents Department

The air forces on a model of the sperry messenger airplane without propeller

Description: From Summary: "This is a report on a scale effect research which was made in the variable-density wind tunnel of the National Advisory Committee for Aeronautics at the request of the Army Air Service. While the present report is of a preliminary nature, the work has progressed far enough to show that the scale effect is almost entirely confined to the drag."
Date: 1926?~
Creator: Munk, Max M. & Diehl, Walter S.
Partner: UNT Libraries Government Documents Department

Characteristics of a boat type seaplane during take-off

Description: This report, on the planing and get-away characteristics of the F-5-L, gives the results of the second of a series of take-off tests on three different seaplanes conducted by the National Advisory Committee for Aeronautics at the suggestion of the Bureau of Aeronautics, Navy Department. The single-float seaplane was the first tested and the twin-float seaplane is to be the third. The characteristics of the boat type were found to be similar to the single float, the main difference being the increased sluggishness and relatively larger planing resistance of the larger seaplane. At a water speed of 15 miles per hour the seaplane trims aft to about 12 degrees and remains in this angular position while plowing. At 2.25 miles per hour the planing stage is started and the planing angle is immediately lowered to about 10 degrees. As the velocity increases the longitudinal control becomes more effective but over control will produce instability. At the get-away the range of angle of attack is 19 degrees to 11 degrees with velocities from the stalling speed through about 25 per cent of the speed range.
Date: January 1926
Creator: Crowley, J. W., Jr. & Ronan, K. M.
Partner: UNT Libraries Government Documents Department

Experiments with an airfoil from which the boundary layer is removed by suction

Description: Our attempts to improve the properties of airfoils by removing the boundary layer by suction, go back to 1922. The object of the suction is chiefly to prevent the detachment of the boundary layer from the surface of the airfoil. At large angles of attack, such detachment prevents the attainment of the great lift promised by the theory, besides greatly increasing the drag, especially of thick airfoils. This report gives results of those experiments.
Date: August 1926
Creator: Ackeret, J.; Betz, A. & Schrenk, O.
Partner: UNT Libraries Government Documents Department

The spacing of orifices for the measure of pressure distributions

Description: The following report has been prepared for publication by the NACA. Suitable locations of orifices for the measurement of pressure distributions have been discussed. Tables are given for quickly laying out these locations and for quickly and easily computing the resultant air forces from the result of the measurements.
Date: January 1, 1926
Creator: Munk, Max M.
Partner: UNT Libraries Government Documents Department

The Supermarine "Southampton" seaplane : observation or bomber

Description: Purchased for the British Air Ministry, the Southampton seaplane uses 2 Napier Lion engines and has a boat hull with outriggers mounted on the wings. It was designed as a military aircraft and can be easily converted to a bomber.
Date: December 1, 1926
Partner: UNT Libraries Government Documents Department

Report on tests of metal model propellers in combination with a model VE-7 airplane

Description: This report, prepared at the request of the NACA, describes tests of three metal model propellers, in a free air stream and in front of a model of a VE-7 airplane. The effect of introducing the model airplane is shown to be an increase in thrust and power coefficients and efficiency at small slip, and a decrease in the same at large slip.
Date: August 1926
Creator: Lesley, E. P.
Partner: UNT Libraries Government Documents Department

Analyses of Virginia Coals

Description: Report containing several articles discussing coal in the state of Virginia. These articles cover geographic deposition of coal, coal production, mining methods, and analyses of coal samples. Index begins on page 71.
Date: 1926
Creator: Eby, J. Brian, (James Brian), 1896-; Campbell, Marius Robinson, 1858-1940; Paul, J. W.; Fieldner, Arno Carl, 1881-1966; Cooper, Harry Mac, 1882-; Osgood, F. D., 1888-1935 et al.
Partner: UNT Libraries Government Documents Department

What is Known about the Effect of Smoke on Health

Description: From title page: "For some years the Bureau of Mines, in connection with its investigations relating to efficiency in the combustion of fuels, as been engaged in a study of smoke prevention. Popular support for such work is usually based upon the injurious effects of smoke on the human ssytem, and this paper is published as a contribution to the literature dealing with that subject."
Date: December 7, 1926
Creator: White, William Charles
Partner: UNT Libraries Government Documents Department

Report of the Nineteenth National Conference on Weights and Measures, 1926

Description: Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.
Date: 1926
Creator: United States. Bureau of Standards.
Partner: UNT Libraries Government Documents Department

Beneficiation and Utilization of Georgia Clays

Description: From Introduction: "This report is divided into six parts as follows: (1) Occurrence of clays in Georgia and the source of the clays tested; (2) washing tests; (3) physical test; (4) utilization of kaolins white ware; (5) utilization of clays in refractories; and (6) utilization of clays in face brick."
Date: 1926
Creator: Stull, R. T. & Bole, G. A.
Partner: UNT Libraries Government Documents Department

Underground Limestone Mining

Description: From Introduction: "The aim of the report is to help the superintendent and the operator to adopt the safest and most efficient methods of removing rock underground."
Date: 1926
Creator: Thoenen, J. R.
Partner: UNT Libraries Government Documents Department

Oil-Field Emulsions

Description: From Introduction: "This bulletin deals entirely with the cause and removal of water emulsified in crude petroleum and the colloidal theories involved."
Date: 1926
Creator: Dow, D. B.
Partner: UNT Libraries Government Documents Department

Possibilities for the Commercial Utilization of Peat

Description: From Introduction: "The characteristics of the numerous varieties and types of peat and their geographic distribution in the United States have been discussed at length in those publications. This report therefore considers these topics only in their relation to the subjects specified in the following act (40 Stat. 1154) authorizing the investigation described herein."
Date: 1926
Creator: Odell, W. W. & Hood, O. P.
Partner: UNT Libraries Government Documents Department

Coal-Mine Fatalities in the United States, 1925

Description: Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date: 1926
Creator: Adams, William W.
Partner: UNT Libraries Government Documents Department

Quarry Accidents in the United States During the Calendar Year 1924

Description: Report published by the U.S. Bureau of Mines which is a compilation of accidents in quarries located in the United States with data regarding the number and kinds of accidents as well as information about the mining operations (e.g., number of men employed, kinds of quarries, amount of work performed, etc.).
Date: 1926
Creator: Adams, William W.
Partner: UNT Libraries Government Documents Department

Metal-Mine Accidents in the United States During the Calendar Year 1924

Description: Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date: 1926
Creator: Adams, William W.
Partner: UNT Libraries Government Documents Department