ISBN: 1443232955

[EAN: 9781443232951], Neubuch, [PU: RareBooksClub.com], UNITED STATES. NATIONAL STANDARDS,LITERATURE AND FICTION,AUTHORS, Literary Criticism|American|General, Biography & Autobiography|Hi… Plus…

[EAN: 9781443232951], Neubuch, [PU: RareBooksClub.com], UNITED STATES. NATIONAL STANDARDS,LITERATURE AND FICTION,AUTHORS, Literary Criticism|American|General, Biography & Autobiography|Historical, Biography & Autobiography|Literary, This item is printed on demand. Paperback. 176 pages. Dimensions: 9.7in. x 7.4in. x 0.4in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: . . . is the increase in resistance per degree, since the R0 is arbitrary to the extent of perhaps 0. 000020 ohm as already fully explained. Throughout the paper this increase is taken to be 0. 008774 ohms per degree; reciprocal 11397 equal 1 ohm. This is a temperature coefficient of increase of resistance equal to 0. 004298 at o, or 0. 003958 at 200, and indicates a very pure grade of copper. 64 M Dcllinger: The Temperature Coefficient of Resistance of Copper, this Bulletin, 7. p. 83, p. 85; 1911. Temperature Scale. --The unit of temperature in which these measurements are expressed is very closely the degree of the International Hydrogen Scale, as closely so as the reproducibility of this scale admits. The scale actually employed is somewhat more accurately reproducible than is the International Hydrogen Scale and is defined by the following relations: The platinum scale (pt), of the standards employed, by definition, Rt--Ro 100 was very closely the scale which is related to the thermodynamic scale (T) by the value 8 1. 49, substituted in the equation as applied to the observed values of R obtained in ice, steam and sulphur vapor (S. B. P. 4445 thermodynamic). It was therefore the scale defined by the purest platinum of Heraeus or of Johnson and Mathey, and is accurately reproducible by using platinum for which the thermometric constants and and a have the values 1. 49 and 0. 391 to 0. 392, respectively. The scale employed (t) was that related to the platinum scale of the standards by the equation 00 and is therefore as reproducible as the (pt) scale discussed above. The reason for choosing 1. 48 rather than 1. 50 or any other number which might be arbitrarily selected, is that when the scale so defined by 1. 48 was compared and quot. . . This item ships from La Vergne,TN.<

ISBN: 9781443232951

Bulletin of the Bureau of Standards Paperback New Books, Textstream