UNT Libraries Government Documents Department - 1,215 Matching Results

Search Results

Results: 1 - 24 next
open access

Child's self-help overall.

Description: This document contains recommendations for the construction of a child's self-help overall, designed for freedom of movement and easy dressing.
Date: December 1948
Creator: Scott, Clarice L. (Clarice Louisba), b. 1899
Item Type: Refine your search to only Book
open access

Experiment Station Record, Volume 95, July-December, 1946

Description: Volume provides abstracts of agricultural experiments conducted during the year. Also includes statistics, convention reports, bulletins, bibliographies, and listings for Spanish edition publications from the Puerto Rico station. Name and subject indexes start on page 913.
Date: 1948
Creator: U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations.
Item Type: Refine your search to only Book
open access

It could happen again.

Description: Describes the importance of soil conservation practices and their effect on wheat production.
Date: June 1948
Creator: United States. Department of Agriculture. Production and Marketing Administration.
Item Type: Refine your search to only Book
open access

Safety Practices in Dredging and Hydraulic Mining

Description: From Scope of Report: "This paper is based upon the observations made and the records received while dredging and hydraulic-mining operations were visited in Alaska during 1946 and in California during 1946 and 1947. Data from 30 active dredging operations and 34 active hydraulic operations are incorporated in this paper."
Date: 1948
Creator: Fatzinger, R. W.
Item Type: Refine your search to only Report
open access

Analyses of Complex Mixtures of Gases: Application to Control and Extinguish Fires and to Prevent Explosions in Mines, Tunnels, and Hazardous Industrial Processes

Description: From Purpose of Report: "The purpose of the report is to point out what the mine-management official, the safety engineer, and the chemist, can do to utilize analyses of complex gas mixtures as basis for safe procedure to (1) control and extinguish fires in mines, tunnels, and individual plants and (2) prevent explosions when dealing with explosive mixtures and sources of ignition. The report is designed to meet the needs of those desiring to utilize analyses of complex-gas mixtures for the abo… more
Date: 1948
Creator: Ash, S. H. & Felegy, E. W.
Item Type: Refine your search to only Report
open access

Coals of Chile

Description: From Introduction: "The purpose of this investigation was to determine whether the coal from beds mined in the Schwager and Lota mines will produce metallurgical coke suitable for use in the blast furnaces at the proposed steel plant at Conception, and whether the quality of the lower-rank coals from other areas in Chile, especially those in Magallanes, where the large coal reserves of Chile appear to exist; can be improved by processing."
Date: 1948
Creator: Toenges, Albert L.; Kelly, Leon W.; Davis, J. D.; Reynolds, D. A.; Fraser, Thomas; Crentz, W. L. et al.
Item Type: Refine your search to only Report
open access

An Index of Shale-Oil Patents

Description: From Introduction: "Work on this project was begun early in 1944; and the results with respect to shale oil are reported in this Bulletin. Since this bulletin is only an index to this large repository of ideas relating to the the treatment of shale oil, the material is presented in the form of short notices describing the subject material of each patent, which consist of an abridgment of the patent (if British or Australian) or a typical claim in the case of the United States or foreign patents… more
Date: 1948
Creator: Klosky, Simon
Item Type: Refine your search to only Report
open access

Natural Icing of an Axial-Flow Turbojet Engine in Flight for a Single Icing Condition

Description: Memorandum presenting an investigation in natural icing conditions to determine the effect of ice formations on the performance of an axial-flow turbojet engine. A description of the change over time in tail-pipe temperature, engine jet thrust, fuel flow, ice collection, and acceleration qualities are provided.
Date: August 12, 1948
Creator: Acker, Loren W.
Item Type: Refine your search to only Report
open access

Preliminary Results of Natural Icing of an Axial-Flow Turbojet Engine

Description: Memorandum presenting a flight investigation in natural icing conditions to determine the effect of ice formations on the performance of an axial-flow turbojet engine. Tail-pipe temperature increased from 761 to 1065 degrees Fahrenheit and the jet thrust decreased from 1234 to 910 pounds during a period of 45 minutes in icing. No general conclusions can be reached from the data because the icing condition was relatively light.
Date: August 6, 1948
Creator: Acker, Loren W.
Item Type: Refine your search to only Report
open access

Effects of Ice Formations on Airplane Performance in Level Cruising Flight

Description: "A flight investigation in natural icing conditions was conducted by the NACA to determine the effect of ice accretion on airplane performance. The maximum loss in propeller efficiency encountered due to ice formation on the propeller blades was 19 percent. During 87 percent of the propeller icing encounters, losses of 10 percent or less were observed" (p. 1).
Date: May 1948
Creator: Preston, G. Merritt & Blackman, Calvin C.
Item Type: Refine your search to only Report
open access

Icing and De-Icing of a Propeller with Internal Electric Blade Heaters

Description: "An investigation has been made in the NACA Cleveland icing research tunnel to determine the de-icing effectiveness of an experimental configuration of an Internal electric propeller-blade heater. Two atmospheric Icing conditions and two propeller operating conditions were Investigated in experiments with unheated blades and with heat applied to the blades both continuously and cyclically. Data are presented to show the effect of propeller speed, ambient air temperature and liquid-water concent… more
Date: August 1948
Creator: Lewis, James P. & Stevens, Howard C., Jr.
Item Type: Refine your search to only Report
open access

De-Icing Effectiveness of External Electric Heaters for Propeller Blades

Description: Note presenting an investigation in the icing research tunnel to determine the icing protection provided by external rubber-clad blade heaters at several icing, heating, and propeller operating conditions. Data are presented to show the effect of propeller speed, ambient-air temperature, liquid-water concentration, heating-power density, duration of heating, and total cycle times on the power requirements and de-icing performance of the blade heaters.
Date: February 1948
Creator: Lewis, James P.
Item Type: Refine your search to only Report
open access

Investigation of Effectiveness of Air-Heating a Hollow Steel Propeller for Protection Against Icing 1: Unpartitioned Blades

Description: From Summary: "An investigation to determine the effectiveness of icing protection afforded by air-heating hollow steel unpartitioned propeller blades has been conducted In the NACA Cleveland icing research tunnel. The propeller used was a production model modified with blade shank and tip openings to permit internal passage of heated air. Blade-surface and heated-air temperatures were obtained and photographic observations of Ice formations were made with variations In icing intensity and heat… more
Date: May 1948
Creator: Mulholland, Donald R. & Perkins, Porter J.
Item Type: Refine your search to only Report
Back to Top of Screen