Technologic Papers of the Bureau of StandardsU.S. Government Printing Office, 1928 - Technology |
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Common terms and phrases
absorption absorptive index acetone alloys amount appears approximately asbestos average bath Brinell number Bureau of Standards carbon caroá cellulose cent Per cent chemical chromic acid chromium cleaning preparation coloring matter column strength compression compressive strength concentration cone containing coupons crystals curve deflection deposit determined diameter discoloration dry substance effect efflorescence fiber filter filtrate freezings frequency Freund graphite grit hysteresis increase indentation indicated iron Lbs./in limestone machine marble material measurements metal method Modulus of elasticity obtained Parallel Perpendicular pipe plating porosity pounds pulp ratio resistance Rockwell numbers salt samples scrubbing shearing sheet shown in Figure silicon silver alloys slabs sodium sodium carbonate spalling specific gravity specimens steel stone stress sugar sulphate sulphite cellulose extracts surface tannin tarnish-resistant TECHNOLOGIC PAPERS temperature tensile strength thickness tion transverse trisodium phosphate tubes turbid values wave length weight window envelopes yield point
Popular passages
Page 222 - If the number is less than 1, make the characteristic of the logarithm negative, and one unit more than the number of zeros between the decimal point and the first significant figure of the given number.
Page 175 - A summary of available data by previous observers on the thermal expansion of graphite (natural and artificial) and of other forms of carbon is included. In the present investigation the coefficients of expansion of graphite were found to be low.
Page 346 - The causes of the continuing decrease in the production of gold and silver. 2. The causes of the depressed condition of the gold and silver industry in the United States. 3. The production, reduction, refining, transportation, marketing, sale, and uses of gold and silver in the United States and elsewhere.
Page 516 - ... entirely of synthetic dyes. Stains from dye inks may be treated as outlined above for that type. However, some indelible inks contain silver salts which cause a black stain. This may be removed with ammonia water applied on a layer of cotton batting. Usually several applications will be necessary. 4. Tobacco Stains Method No. 1. — The grit scrubbing powders, commonly used on marble, terrazzo, and tile floors are usually satisfactory for application as a poulticing material on this type of stain....
Page 516 - ... with whiting and applied as a poultice. A mixture of equal parts of chlorinated lime and whiting reduced to a paste with water may also be used as a poulticing material.
Page 517 - If it is desired to apply this with a brush, add about one teaspoonful of sugar to each pound of powdered talc. When dry scrape off with a wooden paddle or trowel. This mixture is a strong bleaching agent and is corrosive to metals, hence in using it care should be taken not to drop it on colored fabrics or metal fixtures. This formula is also valuable for treating other stains and will be frequently referred to in the following methods.
Page 222 - Since there are two zeros between the decimal point and the first significant figure the characteristic is —2.
Page 517 - Mix the contents of a 12-ounce can of chlorinated lime to a paste in a shallow enameled pan by adding water slowly and mashing the lumps with a spatula or pointing trowel.
Page 299 - The address should be written clearly and boldly, preferably in typewriting, but in any case with ink of a dense black or other strongly contrasting color. Changes in address must not be made on the "window" but on the opaque portion of the envelope. "Window" envelopes not conforming to the foregoing are unmailable. Addressing.
Page 81 - Research on the Production of Currency Paper in the Bureau of Standards Experimental Paper Mill, Technol.