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 Decade: 1920-1929
 Collection: Technical Report Archive and Image Library
The Meaning of Specifications for Gasoline and Kerosene
Report on how to identify good gasoline and kerosene, written for the average citizen, with an explanation of purchaser and supplier relationships. digital.library.unt.edu/ark:/67531/metadc100838/
Educational Agencies in Mining Communities
Report on the importance of industrial education in the mining sector. It explains general education and facilities for specialized education for proficiency in a given field. digital.library.unt.edu/ark:/67531/metadc100845/
Large Mollier Chart (Foot-Pound-Fahrenheit Units): Properties of Ammonia
Large mollier chart showing the properties of ammonia. digital.library.unt.edu/ark:/67531/metadc100681/
Compressibility of Gases
Reproduction of thirteen graphs for computing compressibilities of various gases and for computing the volumes delivered from cylinders containing various gases. digital.library.unt.edu/ark:/67531/metadc100682/
Reduction Mills in Montana in 1925
List of reduction mills in Montana, compiled in the course of investigations of mineral resources of Montana. It includes information about each loaction including: the process, character of ore, when the mill was operated, and custom work; equipment and power used; and capacity in tons. digital.library.unt.edu/ark:/67531/metadc100839/
Regulations and Inspection Prevent Accidents from Falls of Roof
Report on the need for regulations and inspections to counter preventable mine roof collapses and resulting injuries and fatalities. digital.library.unt.edu/ark:/67531/metadc100840/
Practical Underground Education of the Coal Miner
Report describing information that should be provided for miners when they are first being trained on-site, as well as an explanation about the education program offered by the Practical Mining School at Dawson, New Mexico. digital.library.unt.edu/ark:/67531/metadc100841/
Survey of Gravities of Domestic Crudes
Report on the comparative gravities of oil extracted from different regions of the United States. digital.library.unt.edu/ark:/67531/metadc100842/
Ocher and Ochery Earths
Report about ocher or ochery earth, "a natural mineral pigment composed largely of clay permeated with hydrated iron (ferric oxide)" (p. 2). It includes information about the uses of choer, substitutes, artificial ocher, mining and local deposits, import and export of ocher, and related information. digital.library.unt.edu/ark:/67531/metadc100843/
Report of the Twenty-First National Conference on Weights and Measures, 1928
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. digital.library.unt.edu/ark:/67531/metadc100661/
Report of the Twenty-Second National Conference on Weights and Measures, 1929
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. digital.library.unt.edu/ark:/67531/metadc100662/
Revision of the American Chipmunks: (Genera Tamias and Eutamias)
Brief summary of the geographic distribution, life history, and subgenera of genera Tamias and Eutamias. digital.library.unt.edu/ark:/67531/metadc701007/
Revision of the American Lemming Mice (Genus Synaptomys)
Brief summary of the geographic distribution, habits, history, and subgenera of Synaptomys. digital.library.unt.edu/ark:/67531/metadc700952/
A Biological Survey of North Dakota
Summary of physiography and life zones and mammals of North Dakota. digital.library.unt.edu/ark:/67531/metadc700930/
A Biological Survey of the Pribilof, Alaska
Brief summary of the geographic distribution, habits, and habitats of the birds, mammals, insects, arachnids, and chilopods of the Pribilof Islands. digital.library.unt.edu/ark:/67531/metadc700963/
Revision of the American Pikas (Genus Ochotona)
Discusses distribution, habitat, habits, pelage, molt, specimens, history, and nomenclature of pikas. Provides descriptions, locations, and a key for species and subspecies. digital.library.unt.edu/ark:/67531/metadc700982/
A Biological Survey of Alabama
Booklet describing the biology of Alabama in two sections: (1) physiography and life zones, and (2) mammals. It also includes an annotated species list of mammals, bibliography, and index starting on page 81. digital.library.unt.edu/ark:/67531/metadc700959/
Voles of the Genus Phenacomys
Nests, young, food, habits, and enemies of the voles of the genus Phenacomys. digital.library.unt.edu/ark:/67531/metadc700988/
Taxonomic Review of American Long-tailed Shrews (Genera Sorex and Microsorex)
Brief summary of the habitat, habits, food and economic status, measurements, subfamilies, and subgenera of genera Sorex and Microsorex. digital.library.unt.edu/ark:/67531/metadc700975/
The Legendary "White Metal" and its "Ore"
Report concerning stories about claims of a "white metal" extracted from an "ore" found packed around pieces of iron or steel. It includes information about various tests conducted about the validity of these claims and their findings. digital.library.unt.edu/ark:/67531/metadc100837/
Future Timber Supply for Coal Mines: What One Company is Doing
Report discussing a case study of a coal company in Western Pennsylvania to show how mining companies might decrease their timber bills. digital.library.unt.edu/ark:/67531/metadc100851/
What is Known about the Effect of Smoke on Health
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." digital.library.unt.edu/ark:/67531/metadc100852/
Recovery of Gold from Black Sand Tailings
Report on the recovery of gold from black sand tailings, based on tests conducted at the U.S. Bureau of Mines' Alaska Station. digital.library.unt.edu/ark:/67531/metadc100847/
The Recovery of Unburned Fuel from Boiler Furnace Refuse
Report on recovering unburned fuel from boiler furnace refuse, based on processes used in Europe and tests in the United States. digital.library.unt.edu/ark:/67531/metadc100848/
Metal Mine Ventilation and its Relation to Safety and Efficiency in Mining Operations
Report on mine ventilation and its relation to safety and efficiency. digital.library.unt.edu/ark:/67531/metadc100846/
Carbon Tetrachloride Extinguisher of Electric Fires
Report discussing "the extent and nature of the hazards to firefighters from gases and smoke resulting from the application of carbon tetrachloride extinguisher to electric arcs, burning insulation or fires such as may occur in electrical apparatus and machinery. The experiments described were made for the purpose of determining the nature of gases and smoke and ascertaining their toxic properties" (p. 1). digital.library.unt.edu/ark:/67531/metadc100850/
Comparison of Gas Masks, Hose Masks, and Oxygen-Breathing Apparatus
Report providing information about the most appropriate kinds of breathing apparatus -- gas masks, hose masks, or self-contained oxygen-breathing apparatus -- to use in different situations. digital.library.unt.edu/ark:/67531/metadc100849/
National Electrical Safety Code, 4th edition
Fourth edition of the United States Electrical Safety Code. digital.library.unt.edu/ark:/67531/metadc100727/
Discussion of the National Electrical Safety Code: (to Accompany the Third Edition of the Code), October 31, 1920
Discussion of the updated rules in the third edition of the National Electrical Safety Code. digital.library.unt.edu/ark:/67531/metadc100728/
Motor-Vehicle Headlighting
A report on the necessity of improved motor-vehicle lighting. digital.library.unt.edu/ark:/67531/metadc100737/
National Bureau of Standards: its functions and activities
A report on the functions of the National Bureau of Standards. digital.library.unt.edu/ark:/67531/metadc100734/
Tables of thermodynamic properties of ammonia
A report containing tables of thermodynamic properties of ammonia. digital.library.unt.edu/ark:/67531/metadc100736/
Annual Report of the Director of the Bureau of Standards to the Secretary of Commerce for the Fiscal Year Ended June 30, 1922
Annual report of the director of the U.S. National Bureau of Standards discussing the staff, facilities, and activities of the agency during the fiscal year 1921-1922. digital.library.unt.edu/ark:/67531/metadc100697/
Report of the Nineteenth National Conference on Weights and Measures, 1926
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. digital.library.unt.edu/ark:/67531/metadc100659/
Performance of B. M. W. 185-Horsepower Airplane Engine
No Description digital.library.unt.edu/ark:/67531/metadc172405/
Mollier Chart of Properties of Ammonia, 1923
Mollier chart of properties of ammonia. digital.library.unt.edu/ark:/67531/metadc100680/
Strain Lines Developed by Compressive Tests on Structural Members of the Delaware River Bridge at the United States Bureau of Standards for the Delaware River Bridge Joint Commission
Strain lines illustrations from Delaware River Bridge. digital.library.unt.edu/ark:/67531/metadc100683/
Operation and Care of Vehicle-Type Batteries
Manual for operation and care of storage batteries for use in Army depots. digital.library.unt.edu/ark:/67531/metadc100735/
Analyses of Virginia Coals
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. digital.library.unt.edu/ark:/67531/metadc100833/
Permissible Explosives, Mining Equipment, and Apparatus Approved Prior to January 1, 1924
Report documenting mining explosives, equipment, and breathing apparatuses approved by the United States Bureau of Mines prior to January 1, 1924. digital.library.unt.edu/ark:/67531/metadc100834/
Morane-Saulnier 180 light airplane (French) : a single-seat training monoplane
Equipped with a 40 HP Salmson engine, it is a single seat parasol type construction. digital.library.unt.edu/ark:/67531/metadc279673/
Nieuport-Delage 640 (French) : commercial high-wing monoplane
The Nieuport Delage 640 is a single engine commercial high-wing monoplane of all wood construction, including the fuselage and tail. It's landing gear is hinged in two parts. digital.library.unt.edu/ark:/67531/metadc279648/
Liore-Olivier airplane : type 12 night-bomber or type 20 commercial
No Description digital.library.unt.edu/ark:/67531/metadc279601/
The Francois Villiers marine pursuit airplane
A traditional biplane design allows this craft to function with the speed and maneuverability necessary to perform as a pursuit aircraft while also being able to land on water. It featured retractable landing gear for water landings. It was powered with a 450 HP. Lorraine-Dietrich engine. digital.library.unt.edu/ark:/67531/metadc279671/
The Westland IV commercial monoplane (British)three "Cirrus III" engine
No Description digital.library.unt.edu/ark:/67531/metadc279633/
The Short "Calcutta" : first British all-metal commercial seaplane
The Calcutta is a large seaplane, with seating for 16 and a payload of 3,400 pounds. digital.library.unt.edu/ark:/67531/metadc279641/
Bleriot-Spad 91 Airplane (French) : pursuit single-seater, type "Jockey"
This aircraft has announced a speed of 270 km per hour at 4000 m. It is of all metal construction. digital.library.unt.edu/ark:/67531/metadc279665/
Avia pursuit airplane B.H. 21
Built by the 'Czecho-Slovakian' aircraft factory, AVIA, the B.H. 21, has a top speed of 250 MPH, and carries 120 kg of gasoline and 20 kg of oil, giving it a radius of action of 600-650 km. It is equipped with a Hispano-Suiza engine capable of 300 HP. digital.library.unt.edu/ark:/67531/metadc279614/
Lockheed "Vega" airplane : a commercial cabin monoplane
The Vega is a high wing monoplane suitable for commercial purposes. It can seat 6 passengers or 100 cubic feet of cargo. digital.library.unt.edu/ark:/67531/metadc279670/
The Westland "Widgeon III" "Cirrus II: or "Genet II" engine
The Widgeon III is a parasol type monoplane. One of it's strongest features was the high degree of visibility available to the pilot. digital.library.unt.edu/ark:/67531/metadc279676/
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