Journal of Research of the National Bureau of Standards, Volumen16Department of Commerce, National Bureau of Standards, 1936 |
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Términos y frases comunes
a-c bridge accuracy acid alloys approximately average basket weave breaking strength Bureau of Standards cadmium cadmium coatings calibrating capacitance capacitor cements cloths coils column computed inductance copper corrosion curve cystine decrease density determined diameter distance eclipse day effect electrolytic iron equation error fabric assistance filling yarns filter flint glass galvanometer glass inductor helix increase indicated Intensity and character ionization Journal of Research lamp magnetic manganese manganin material maximum Maxwell bridge mean measurements metal method micrometer moisture content National Bureau number of warp observed obtained ohms oxide percent photoelectric cell pitch plain weave plates porcelain inductor portland cements prehydrates printing protection coefficient quartz inductor resistance resistor sample shown in figure soils solar solution specimens spectral spectral-energy steel substitution inductor surface temperature thermocouple thermopile thickness tion tube twist multiplier variations warp and filling wave lengths weight wire yarns per inch zinc zinc and cadmium
Pasajes populares
Página 23 - K and E are the complete elliptic integrals of the first and second kind, respectively, each with modulus k, show that k dE/dk = E — K.
Página 19 - K and E are complete elliptic integrals of the first and second kinds, respectively. Derive Euler's recurrence formula kl f_ . 1\ k- | for the coefficients. Jacobi's Expansion and Rodrigues...
Página 171 - This study was made to improve methods for measuring the thickness of an electroplated coating at any specified part of the surface. The " chord " method depends upon just cutting through the coating on a plane surface, with a grinding wheel of known radius, or on a curved surface, with a fine file. In either case the thickness T can be computed from C, the width of the cut, that is) the chord, and R, the radius of the wheel or curved surface, by the equation T = C3/8#.
Página 139 - Effect of Number of Warp and Filling Yarns |per Inch and Some Other Elements of Construction on the Properties of Cloth. 9 pages, 3 illustrations 175 863. Electrical-Resistance Alloys of Copper, Manganese, and Aluminum. 1 1 pages, 5 illustrations 125 864. Action of "Hypo
Página 233 - protection coefficient" of a protective material is the ratio of the thickness of lead to the thickness of the material which absorbs a given x-ray beam to the same extent.
Página 43 - For the five years 1869 to 1873 it averaged 1,551,0002. per annum, and was practically the same at the end of the period as at the beginning...
Página 380 - BULLETIN is designed primarily to give a general and timely review of the activities of the Bureau in brief form. It is a prompt and reliable source of official information. If you have not already subscribed for the BULLETIN, you are invited to do so.
Página 265 - The investigations were conducted in cooperation with the Bridge Department of the Port of New York Authority...
Página 94 - ... of the Coast and Geodetic Survey of the US Department of Commerce.