Abstract
A method for the compensation of a variable light source in photoelectric spectrophotometry is presented. The outputs of a scanning photo-cell and a monitoring cell are fed to two amplifiers. The outputs of these amplifiers are then fed to a self-balancing recording potentiometer. The equipment has laboratory as well as astrophysical applications. The limiting magnitude at which useful spectrophotometry with a resolution of 1A is approximately 4. Further development work is in progress.
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