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Manufactured at the Schenectady plant of the General Electric Company.
This source has recently been replaced by a monoplane filament projection lamp operated directly from the 110-volt d.c. power supply.
This is essentially the same mode of operation that was described in the previous communication.
This optical system may also be used to measure the rotation of the plane of polarization, as by a sugar solution. In this case the sample is inserted between N1and W.
As this paper is submitted for publication, the integrator has been constructed but has not been attached to the spectrophotometer because of a few changes that must be made in the mechanical system of the spectrophotometer.
A Nicol prism
Photograph of spectrophotometer showing the recording table at the left, the monochromator in the center background, and the photometer and integrating sphere at the extreme right. Reading from left to right, the dials indicate the wave-length in millimicrons, the slit width in millimicrons, and the reflection factor (or transmission factor) in percent.
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