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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 7, Iss. 5 — Sep. 1, 1923
  • pp: 377–377

A DEVICE FOR LOGARITHMIC AND SEMI-LOGARITHMIC PLOTTING AND FINDING POWERS AND EXPONENTIALS

R. A. CASTLEMAN, JR.

JOSA, Vol. 7, Issue 5, pp. 377-377 (1923)
http://dx.doi.org/10.1364/JOSA.7.000377


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Abstract

<p>In much laboratory work simultaneous observations are made on two dependent quantities, all others being kept constant. A relation is then sought between these quantities. One of the first recourses is to logarithmic and semi-logarithmic plotting. By dimensional reasoning, relations involving other quantities may then often be inferred, even without further experimentation. A device that combines speed, accuracy, and simplicity for this sort of plotting is therefore desirable as a laboratory adjunct.</p><p>In this paper the theory of logarithmic and semi-logarithmic plotting is reviewed, and a device is described which, it is thought, meets the above demands.</p><p>The theory of power and exponential finding, especially as the inverse of logarithmic and semi-logarithmic plotting, respectively, is also reviewed, and a simple addition to the above apparatus is described, by which one can read powers and exponentials.</p>

Citation
R. A. CASTLEMAN, JR., "A DEVICE FOR LOGARITHMIC AND SEMI-LOGARITHMIC PLOTTING AND FINDING POWERS AND EXPONENTIALS," J. Opt. Soc. Am. 7, 377-377 (1923)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-7-5-377


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