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1931

Volume 2

Issue 12 | Dec | pp. 773-846

Issue 11 | Nov | pp. 665-772

Issue 10 | Oct | pp. 585-664

Issue 9 | Sep | pp. 513-584

Issue 8 | Aug | pp. 437-512

Issue 7 | Jul | pp. 365-436

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Issue 2 | Feb | pp. 67-152

Issue 1 | Jan | pp. 1-66

1930

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Dec 1931

Volume 2, Issue 12, pp. 773-846

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Select this Article		A NEW HIGH VACUUM SYSTEM J. A. Becker and E. K. Jaycox Rev. Sci. Instrum. 2, 773 (1931); http://dx.doi.org/10.1063/1.1748752 (12 pages) \| Cited 9 times Online Publication Date: 17 December 2004 Full Text: \| Download PDF
	+ -	Show Abstract A new high vacuum pumping system is described in which oil^* is used in a diffusion type pump, and a trap containing activated cocoanut charcoal replaces the usual liquid air trap. The system is capable of attaining a pressure of 2×10⁻⁸ mm Hg. A high degree of vacuum can be attained at least as quickly as with a mercury diffusion pump and liquid air trap. The system is especially adapted to maintaining a low pressure for several days in apparatus which cannot conveniently be sealed off from the pumps.

Select this Article		ACID STANDARD CELLS OF THE UNSATURATED TYPE Yûichi Ishibashi and Tadashi Ishizaki Rev. Sci. Instrum. 2, 785 (1931); http://dx.doi.org/10.1063/1.1748753 (12 pages) Online Publication Date: 17 December 2004 Full Text: \| Download PDF
	+ -	Show Abstract M. Eppley,¹ studying the relation between the degree of saturation and the emf, and the temperature coefficient of emf on acid unsaturated standard cells acidified to 0.012 mol per litre of sulphuric acid, has concluded that the acid unsaturated cells with cadmium sulphate concentration of 42.93 percent have negligible temperature coefficients between 15° and 35°C, and that the solutions of these cells might have been saturated at about 4°C. The present authors² measured, in the first place, the solubility of cadmium sulphate into dilute sulphuric acid at different concentrations, and based on the obtained results, with electrolytes of various concentrations from dilute to nearly saturated solutions of cadmium sulphate. They attempted to find out the optimum concentration of cadmium sulphate and acidity of electrolyte, estimated from every point of view, and concluded that cells of concentration of cadmium sulphate 43.0 percent and of acidity 0.05N are most suitable.

Select this Article		OPTIMUM OUTPUTS OF PHOTO‐SENSITIVE DEVICES Earl D. Wilson Rev. Sci. Instrum. 2, 797 (1931); http://dx.doi.org/10.1063/1.1748754 (10 pages) Online Publication Date: 17 December 2004 Full Text: \| Download PDF
	+ -	Show Abstract The terms power sensitivity and voltage sensitivity are defined for photoelectric elements in a circuit, and a mathematical expression is derived to evaluate each of these characteristics for the three classes of light‐sensitive devices. Curves are plotted for comparing the outputs with one another for various intensities of light flux.

Select this Article		A CYLINDRICAL ROTATING SECTOR PHOTOMETER F. Lowell Dunn Rev. Sci. Instrum. 2, 807 (1931); http://dx.doi.org/10.1063/1.1748755 (3 pages) \| Cited 2 times Online Publication Date: 17 December 2004 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		A METHOD FOR MEASURING VERY HIGH VALUES OF RESISTANCE G. M. Rose Rev. Sci. Instrum. 2, 810 (1931); http://dx.doi.org/10.1063/1.1748756 (4 pages) \| Cited 5 times Online Publication Date: 17 December 2004 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		A PHOTOELECTRIC METHOD FOR TESTING CAMERA SHUTTERS Herbert J. Reich and Gordon S. Marvin Rev. Sci. Instrum. 2, 814 (1931); http://dx.doi.org/10.1063/1.1748757 (4 pages) Online Publication Date: 17 December 2004 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		THE MOUNTING OF THIN METALLIC MEMBRANES UNDER TENSION C. K. Stedman Rev. Sci. Instrum. 2, 818 (1931); http://dx.doi.org/10.1063/1.1748758 (2 pages) Online Publication Date: 17 December 2004 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		A 200,000 VOLT X‐RAY TUBE William W. Hansen Rev. Sci. Instrum. 2, 820 (1931); http://dx.doi.org/10.1063/1.1748759 (4 pages) \| Cited 2 times Online Publication Date: 17 December 2004 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		ABSTRACTS OF ARTICLES RELATING TO NEW INSTRUMENTS AND METHODS Rev. Sci. Instrum. 2, 824 (1931); http://dx.doi.org/10.1063/1.1748760 (23 pages) \| Cited 1 time Online Publication Date: 17 December 2004 Full Text: \| Download PDF
		Abstract Unavailable

BROWSE VOLUMES

Dec 1931

Volume 2, Issue 12, pp. 773-846

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