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Jun 1930

Volume 1, Issue 6, pp. 309-360


A STROBOSCOPIC RIPPLE TANK

William Baldwin

Rev. Sci. Instrum. 1, 309 (1930); http://dx.doi.org/10.1063/1.1748700 (16 pages) | Cited 1 time

Online Publication Date: 17 December 2004

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A form of ripple tank is described in which the point source of waves is simply a succession of periodic air blasts directed downward onto the surface of the water. Two or more such sources can be used simultaneously and their positions are readily changed from place to place. For the production of rectilinear waves a pulsating linear vibrator is described. For the study and projection of water waves an adjustable stroboscope is used, which can either be driven in strict synchronism and in any desired phase relation with the air blasts, or slowly advanced in one direction or the other. Thus the wave images can be made to advance or retreat across the screen and to stop at any desired stage.
The series of photographs show some of the possibilities of the device in demonstrating reflection, refraction, interference, and diffraction of waves.

A HIGH RESISTANCE LEAK FOR ELECTROMETER USE

A. Keith Brewer

Rev. Sci. Instrum. 1, 325 (1930); http://dx.doi.org/10.1063/1.1748701 (4 pages) | Cited 3 times

Online Publication Date: 17 December 2004

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Abstract Unavailable

GLASS FIBERS FOR RETICULES

Douglas L. Parkhurst

Rev. Sci. Instrum. 1, 329 (1930); http://dx.doi.org/10.1063/1.1748702 (3 pages)

Online Publication Date: 17 December 2004

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Abstract Unavailable

THE FLARIMETER, A CLINICAL INSTRUMENT FOR TESTING CIRCULATORY FITNESS

P. V. Wells

Rev. Sci. Instrum. 1, 332 (1930); http://dx.doi.org/10.1063/1.1748703 (9 pages)

Online Publication Date: 17 December 2004

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Abstract Unavailable

A SENSITIVE METHOD FOR DETERMINING REFRACTIVE INDICES

S. A. Korff and J. Q. Stewart

Rev. Sci. Instrum. 1, 341 (1930); http://dx.doi.org/10.1063/1.1748704 (6 pages) | Cited 1 time

Online Publication Date: 17 December 2004

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A combination of Michelson interferometer and spectroscope is described which has proved useful in giving accurate values of the refractive indices of vapors, especially near absorption lines. The method involves measurements, easily made, of wave lengths of fringes seen in the spectroscope. Photographs of the fringes are given. The combination also provides an interesting method for putting along a spectrum a natural scale of frequencies, provided by these fringes.

SENSITIVE AND MANOMETRIC FLAMES

R. C. Colwell

Rev. Sci. Instrum. 1, 347 (1930); http://dx.doi.org/10.1063/1.1748705 (4 pages)

Online Publication Date: 17 December 2004

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Abstract Unavailable

ABSTRACTS OF ARTICLES RELATING TO NEW INSTRUMENTS AND METHODS

Rev. Sci. Instrum. 1, 351 (1930); http://dx.doi.org/10.1063/1.1748706 (10 pages)

Online Publication Date: 17 December 2004

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Abstract Unavailable
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