Technical Paper, Issue 551

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U.S. Government Printing Office, 1933 - Mines and mineral resources
 

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Page 4 - The committee on fatigue phenomena of metals has recently been discharged and the work turned over to the American Society for Testing Materials and the American Society of Mechanical Engineers.
Page 44 - Technical Paper 150. limits of Complete Inflammability of Mixtures of Mine Gases and of Industrial Gases with Air, by GA Burrell and AW Ganger.
Page 42 - As soon as this artificial respiration has been started and while it is being continued, an assistant should loosen any tight clothing about the patient's neck, chest or waist. Keep the patient warm. Do not give any liquids whatever by mouth until the patient is fully conscious.
Page 73 - ... Steel Showing Imperfections. (Courtesy Dr. HH Lester.) RADIOGRAPHY While X-rays penetrate matter opaque to light, they are absorbed in accordance with a simple exponential law. Any inhomogeneity or defect in a material will have a different density and absorbing power for X-rays than the main body of material. Hence, the X-rays which pass through a material will have varying intensity and when they strike a photographic plate, a "Shadowgraph" of the specimen is registered, which may also be visually...
Page 43 - Katz, SH, and Bloomfield, JJ, Gas Masks for Gasoline and Petroleum Vapors : Tech. Paper 348, Bureau oí Mines, 1924, p.
Page 39 - Poisoning in the Texas Panhandle, Big Lake (Tex.) and McCamey (Tex.) Oil Fields, by WP Yant and HC Fowler. 1926. 20 pp., 3 figs. Describes findings of investigation of "poison gas" encountered during development of certain Texas oil fields.
Page 46 - Flame is said to be self-propagated through a mixture of combustible gas and air, or of combustible gas, and oxygen, when enough of the combustible gas is present to permit combustion to spread through the mixture from any given point of ignition. Then propagation of flame takes place from layer to layer of the mixture without the continued presence of the source of heat that started the inflammation.
Page 43 - Inhalation of gasoline and other volatile hydrocarbons given off by petroleum causes headache, dizziness, and frequently an intoxication in which the victim becomes excited and hysterical. Experiments made by the Bureau of Mines have shown that the odor of...
Page 69 - ... describes the limitations of this method as under: "This method is not to be considered as a substitute for customary precautionary or inspection methods, but is to be used as an additional measure of safety to life and 16 ment of the idea by refiners before they are thoroughly acquainted with these principles and the proper manner of drilling and spacing may easily result in defeating its purpose. Too great a reliance on the plan to the exclusion of all other safety measures should not be permitted.
Page 18 - Resistance to acidic substances and gases, such as hydrogen chloride and hydrogen sulphide. 2. Permanency under rapid heating or cooling; ie, having a coefficient of expansion, crushing and tensile strength, and elasticity of properly related values. 3. Strong adhesion to the steel shell, chamber, or other surface to be protected and hardness to withstand hammering and cleaning of the inside surface of the chamber.

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