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Abstracts of Current Decisions on Mines and Mining: May to August, 1919

Description: Bulletin issued by the U.S. Bureau of Mines: "This publication is devoted exclusively to a review and abstracts of decisions based on the laws governing the rights and duties of mine owners, operators, miners, and persons trafficking in all kinds of mining properties. It includes abstracts of current decisions of all the Federal and State courts of last resort on questions relating to the mining industries" (Bulletin 61, p. 9).
Date: 1920
Creator: Thompson, J. W.
Item Type: Refine your search to only Report
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The aerodynamic properties of thick aerofoils suitable for internal bracing

Description: From Introduction: "The object of this investigation was to determine the characteristics of various types of wings having sufficient depth to entirely inclose the wing bracing, and also to provide data for the further design of such sections. Results of the investigation of the following subjects are given: (1) effect of changing the upper and lower camber of thick aerofoils of uniform section; (2) effect of thickening the center and thinning the tips of a thin aerofoil; (3) effect of adding a… more
Date: 1920
Creator: Norton, F. H.
Item Type: Refine your search to only Report
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Airplane Performance as Influenced by the Use of a Supercharged Engine

Description: "The question of the influence of a supercharged engine on airplane performance is treated here in a first approximation, but one that gives an exact idea of the advantage of supercharging. Considered here is an airplane that climbs first with an ordinary engine, not supercharged, and afterwards climbs with a supercharged engine. The aim is to find the difference of the ceilings reached in the two cases" (p. 1).
Date: May 1920
Creator: de Bothezat, George
Item Type: Refine your search to only Report
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The Alfalfa Caterpillar

Description: "The alfalfa caterpillar is one of the most destructive insect pests of alfalfa in the southwestern United States. In 1914 a complete report of the life history of this caterpillar, together with the methods of control, was published. The present paper contains additional information relating to methods of controlling the pest by the management of irrigation water as well as a brief account of its natural history, and is intended to meet the ever-increasing demands of ranchers and others for as… more
Date: 1920
Creator: Wildermuth, V. L.
Item Type: Refine your search to only Pamphlet
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Alsike Clover

Description: Report discussing the distribution and cultivation of the leguminous crop alsike clover, which grows primarily in the northeastern United States. Topics discussed include soil requirements, seeding, uses, and insect enemies and diseases.
Date: 1920
Creator: Pieters, A. J.
Item Type: Refine your search to only Pamphlet
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Angoumois Grain Moth

Description: Report discussing the Angoumois grain moth, a pest now common in the United States which is destructive to corn, wheat, and other grains. Topics include the moth's life cycle, infestations, and methods of controlling it, including prompt thrashing and fumigation.
Date: 1920
Creator: Back, E. A. (Ernest Adna), 1886-
Item Type: Refine your search to only Pamphlet
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Aspen Borer and How to Control It

Description: "This bulletin gives methods of controlling the aspen borer or reducing its damage to a minimum. It is based on extensive studies made in the Pikes Peak region of Colorado, but the data in general apply to all regions of the United States where the poplars are native. The introduced Lombardy poplar is very seldom injured, but the commercial cottonwood of the Mississippi Valley seems to be the only native species of poplar which is at all immune to the attack of this insect." -- p. 2
Date: 1920
Creator: George Hofer, 1863-
Item Type: Refine your search to only Pamphlet
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The Brown-Spot of Corn with Suggestions for Its Control

Description: "The purpose of this bulletin is to familiarize the farmer with the appearance, distribution, nature, and economic importance of the brown-spot of corn and to offer certain helpful suggestions for its control.... High temperature in combination with high humidity favors the development of the disease. For this reason the damage is greater in the South, where high temperatures prevail throughout the summer and the rainfall is rather heavy. The disease is caused by a minute fungus parasite.... Ca… more
Date: 1920
Creator: Tisdale, W. H. (Wendell Holmes), 1892-
Item Type: Refine your search to only Pamphlet
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California Oak Worm

Description: "The live oak and the valley oak, which are characteristic of the landscape of central California, often are stripped of their leaves by a dark-striped worm which is the young stage of a light-brown moth. Besides stripping the trees of their leaves and making the owner think that they are dead, the worm crawls on lawns, walks, fences, and into houses, swimming pools, etc., becoming a general nuisance.... This bulletin describes and illustrates the worm and its work, tells about its habits and n… more
Date: 1920
Creator: Burke, H. E. (Harry Eugene), 1878-1963 & F. B. (Frank Barnes) Herbert, 1890-
Item Type: Refine your search to only Pamphlet
open access

Carbureting Conditions Characteristics of Aircraft Engines

Description: Tests were conducted at the altitude laboratory erected at the Bureau of Standards for the National Advisory Committee for Aeronautics to determine the changes in engine performance with changes in atmospheric temperature and pressure at various levels above the earth's surface, with special reference to (a) the variables affecting the functioning of the carburetor and (b) the changes in performance resulting from variables in the carburetor itself. This report constitutes a concise statement o… more
Date: 1920
Creator: Tice, Percival S.
Item Type: Refine your search to only Report
open access

Carpet Grass

Description: Report discussing carpet grass, which is an unappreciated but highly valuable grass that grows in permanent pastures on sandy soils, especially in the Coastal Plain of the southern United States. Discussion focuses on growing conditions and pasture practices.
Date: 1920
Creator: Piper, Charles V. (Charles Vancouver), 1867-1926
Item Type: Refine your search to only Pamphlet
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