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The oxygen saturation of arterial blood in man can be measured continuously in situ by means of bichromatic photoelectric colorimetry of the intact fully flushed ear. The accuracy of the device as determined by gas analysis of arterial blood samples is from 3 to 8 percent. The entire optical and...
Previous cells for the ultracentrifuge have proved inadequate because of leakage, distortion, breakage of quartz windows, and lack of facilities for proper alignment. These difficulties have been studied and remedies provided, particularly through the strengthening of cell parts, the use of a...
An apparatus is described for following in detail changes in light intensity that occur in times of the order of one microsecond. It has been applied to measure the decay of fluorescence and to measure the decay of light from a nitrogen discharge. The light to be measured falls on an electron...
An apparatus is described for the measurement of the scattering of low velocity ions in gases. This consists essentially of an ion source, focusing devices, a magnet for velocity and species selection, and a measuring chamber. Technique of construction and operation is described which enables...
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