You limited your search to:

 Decade: 1920-1929
 Year: 1920
 Collection: Technical Report Archive and Image Library
Metal Mine Ventilation and its Relation to Safety and Efficiency in Mining Operations

Metal Mine Ventilation and its Relation to Safety and Efficiency in Mining Operations

Date: June 1920
Creator: Harrington, D.
Description: Report on mine ventilation and its relation to safety and efficiency.
Contributing Partner: UNT Libraries Government Documents Department
Recovery of Gold from Black Sand Tailings

Recovery of Gold from Black Sand Tailings

Date: October 1920
Creator: Gross, John
Description: Report on the recovery of gold from black sand tailings, based on tests conducted at the U.S. Bureau of Mines' Alaska Station.
Contributing Partner: UNT Libraries Government Documents Department
Operation and Care of Vehicle-Type Batteries

Operation and Care of Vehicle-Type Batteries

Date: June 7, 1920
Creator: Vinal, George W.
Description: Manual for operation and care of storage batteries for use in Army depots.
Contributing Partner: UNT Libraries Government Documents Department
Stability of the parachute and helicopter

Stability of the parachute and helicopter

Date: January 1, 1920
Creator: Batemen, H
Description: This report deals with an extension of the theory of stability in oscillation to the case of aircraft following a vertical trajectory, and particularly to the oscillations of parachutes.
Contributing Partner: UNT Libraries Government Documents Department
Supplies and production of aircraft woods

Supplies and production of aircraft woods

Date: January 1, 1920
Creator: Sparhawk, W N
Description: The purpose of this report is to present in brief form such information as is available regarding the supplies of the kinds of wood that have been used or seem likely to become important in the construction of airplanes, and the amount of lumber of each species normally put on the market each year. A general statement is given of the uses to which each kind of wood is or may be put.
Contributing Partner: UNT Libraries Government Documents Department
An Introduction to the Laws of Air Resistance of Aerofoils

An Introduction to the Laws of Air Resistance of Aerofoils

Date: January 1, 1920
Creator: De Bothezat, George
Description: Report presents methods of calculating air resistance of airfoils under certain conditions of flow phenomena around the airfoil.
Contributing Partner: UNT Libraries Government Documents Department
The Ultra-Violet and Visible Transmission of Various Colored Glasses

The Ultra-Violet and Visible Transmission of Various Colored Glasses

Date: March 19, 1920
Creator: Gibson, K. S.; Tyndall, E. P. T. & McNicholas, H. J.
Description: Technical paper issued by the Bureau of Standards over studies conducted on transmissions of ultra-violet energy through different colored glasses. As stated in the introduction, "in the present paper are given the transmissions for the visible and ultra-violet of a large number of glasses, mostly colored, which are not used primarily for eye protection, but which are useful for various other purposes" (p. 3). This paper includes illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
A New Interferential Dilatometer

A New Interferential Dilatometer

Date: February 28, 1920
Creator: Priest, Irwin G.
Description: Scientific paper issued by the Bureau of Mines over development of a dilatometer. The instrument is used in tests of thermal expansion. The methods are presented and discussed. This paper includes an illustration.
Contributing Partner: UNT Libraries Government Documents Department
Efflux of Gases Through Small Orifices

Efflux of Gases Through Small Orifices

Date: January 28, 1920
Creator: Buckingham, Edgar & Edwards, Junius David
Description: Scientific paper issued by the Bureau of Standards over studies conducted on gas effusion rates. The methods used and the results of the studies are presented and discussed. This paper includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
The Manufacture of Sulphuric Acid in the United States

The Manufacture of Sulphuric Acid in the United States

Date: July 1920
Creator: Wells, Arthur Edward & Fogg, Donald E.
Description: Report issued by the Bureau of Mines over the production of sulfuric acid. As stated in the introduction, "the present bulletin was prepared to cover the main facts in regard to the industry in this country, including a discussion of the supplies of sulfur-bearing raw materials, the situation of the acid plants, the principal points in regard to manufacturing processes, and the uses of the acid" (p. 2). This report includes tables, illustrations, photographs, and a map.
Contributing Partner: UNT Libraries Government Documents Department
FIRST PREV 1 2 3 4 5 NEXT LAST