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The Death Valley Expedition: A Biological Survey of Parts of California, Nevada, Arizona, and Utah, Part 2

Description: Collection of reports on Death Valley, the bordering region of California, Nevada, Arizona, and Utah. Reports include birds, reptiles and Batrachians, fishes, insects, mollusks, trees and shrubs, cactuses and yuccas, and list of localities in the reports.
Date: May 31, 1893
Creator: Fisher, A. K.; Stejneger, Leonhard; Gilbert, Charles H.; Riley, C. V.; Stearns, R. E. C.; Merriam, C. Hart et al.
Item Type: Refine your search to only Report
open access

Barnyard Manure.

Description: Describes the benefits of more economical management of organic farm resources, namely barnyard manure. Discusses the management and application of methods for using fertilizers on the farm.
Date: May 10, 1906
Creator: United States. Department of Agriculture.
Item Type: Refine your search to only Book
open access

Private Signals at Sea, Report

Description: Report of the Committee on Commerce detailing the opinions and recommendations of the Committee on the proposed Senate bill 6958 to provide for private signals at sea. It includes a letter from the Department of Commerce and Labor on the proposed legislation.
Date: May 7, 1908
Creator: United States. Congress. Senate. Committee on Commerce.
Item Type: Refine your search to only Report
open access

Waste of Oil and Gas in the Mid-Continent Fields

Description: Technical paper issued by the Bureau of Mines over studies of waste in oil and gas fields in the mid-continent area. As stated in the introduction, this report "describes the general amounts and kinds of waste, and attempts to show the importance of conserving these natural resources" (p. 5). This paper includes tables, maps, illustrations, and photographs.
Date: May 1914
Creator: Blatchley, Raymond S.
Item Type: Refine your search to only Report
open access

Gold Dredging in the United States

Description: Report discussing the development of gold dredging in the United States, the essential features of present-day dredges, the facts that determine whether a placer deposit can be profitably dredged, and the approved methods of prospecting placer ground and of operating dredges. Intended for designers and builders of dredges, mining engineers, and persons who may contemplate investing capital in placer-mining ventures.
Date: May 1918
Creator: Janin, Charles
Item Type: Refine your search to only Report
open access

Suggestions for Improved Methods of Mining Coal on Indian Lands in Oklahoma

Description: Technical paper issued by the Bureau of Mines over studies of Oklahoma coal mines. As stated in the introduction, "this report describes the systems of mining used, points out their defects, and presents suggestions for improved methods, more especially as regards the applicability of different modifications of the panel system to mining coal in Oklahoma" (p. 5). This paper includes tables, maps, and illustrations.
Date: May 1918
Creator: Rutledge, J. J. & Harrington, Daniel
Item Type: Refine your search to only Report
open access

Destroy the Common Barberry

Description: Discusses the importance of eradicating the common barberry bush in order to prevent the spread of the disease black stem rust to wheat, oats, barley, rye, and wild grasses. Farmers are advised to dig up all common barberry bushes; however, Japanese barberry bushes are harmless and can remain, or farmers may even replace common barberry bushes with Japanese barberry bushes.
Date: May 1919
Creator: E. C. (Elvin Charles) Stakman, 1885-1979
Item Type: Refine your search to only Pamphlet
open access

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
open access

The Problem of the Helicopter

Description: Report discussing some of the issues regarding the design and operation of helicopters and the theoretical basis behind them. Some particular issues covered include propeller blade design, helicopters in forced descent, horizontal travel, and stability and control.
Date: May 1920
Creator: Warner, E. P.
Item Type: Refine your search to only Report
open access

Relation of Rib Spacing to Stress in Wing Planes

Description: The stress relations to the fabric and the rib consequent upon a change of spacing between ribs in a wing plane are discussed. Considering the wing plane as a static structure, and ignoring the question of aerodynamic efficiency, it appears that the unit stress in the rib and fabric will remain constant for constant p if the linear dimensions of both rib and fabric are increased alike, viz., if wing and fabric remain geometrically similar. Since the bulge and the structural dimensions remain ge… more
Date: May 1920
Creator: Zahm, A. F.
Item Type: Refine your search to only Report
open access

Performance of a 300-horsepower Hispano-Suiza airplane engine

Description: The National Bureau of Standards tested a 300-horsepower Hispano-Suiza engine to determine the characteristic performance of the engine at various altitudes. The engine was operated at the ground, at 25,000 feet, and at intermediate altitudes, both at full loads similar to those that would be imposed upon the engine at various speeds by a propeller whose normal full-load speed was 1,800 r.p.m. Friction horsepower also was determined in order that the mechanical efficiency of the engine might be… more
Date: May 12, 1920
Creator: Sparrow, S. W. & White, H. S.
Item Type: Refine your search to only Report
open access

Airplane Superchargers

Description: Discussed here are the principles and operation of aircraft engine superchargers used to maintain and increase engine power as aircraft encounter decreases in the density of air as altitude rises. Details are given on the design and operation of the centrifugal compressors. A method is given for calculating the amount of power needed to drive a compressor. The effects of the use of a compressor on fuel system operation and design are discussed. Several specific superchargers that were in operat… more
Date: May 1921
Creator: Noack, W. G.
Item Type: Refine your search to only Report
open access

On a New Type of Wind Tunnel

Description: Discussed here is a new type of wind tunnel, its advantages, the difficulties attendant upon its use, and the special methods required for its operation. The main difference between the new type of wind tunnel and the ones now in operation is the use of a different fluid. The idea is to diminish the effect of viscosity.
Date: May 1921
Creator: Munk, Max
Item Type: Refine your search to only Report
open access

Rice as food.

Description: Describes the international importance of rice; provides various dishes, recipes, tips, and cooking methods, all revolving around rice as a main foodstuff.
Date: May 1921
Creator: United States. Department of Agriculture. Office of Home Economics.
Item Type: Refine your search to only Book
open access

N.A.C.A. control position recorder

Description: Report discussing a new instrument is described which is capable of simultaneously recording the position of the three controls of an airplane. The records are taken photographically on a standard N.A.C.A. film drum and the instrument can be quickly installed in any airplane.
Date: May 1922
Creator: Norton, F. H.
Item Type: Refine your search to only Report
open access

Air traffic

Description: This report presents a recounting of the steps taken by France to establish national and international regulation over air traffic.
Date: May 1922
Creator: Sudre, G.
Item Type: Refine your search to only Report
open access

Aviation and Insurance

Description: This article considers some of the causes which hinder the development of aircraft insurance. Different risks are discussed as well as the causes of aircraft accidents. Pilot error, poor airdromes, weather conditions, poorly adapted airplanes, and engine failures are all examined and some conclusions are made.
Date: May 1922
Creator: Mayo, R. H.
Item Type: Refine your search to only Report
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