Abstract
I NOTE with interest Prof. A. V. Hill's letter in NATURE of May 5, describing the use of a Weston ‘photronic’ cell in a differential galvanometer relay. It is somewhat surprising that Prof. Hill's apparatus gives such a small amplification. A Weston cell which has been used in a photo relay in this Laboratory for the last three months has given consistently a current amplification of 200. As we are using the same type of galvanometer as Prof. Hill, it would seem that the only reason which can explain his having not obtained more than a twenty-fold amplification must be the difference in the optical system.
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JONES, V. Galvanometer Amplification by Photo-Ceil. Nature 133, 872 (1934). https://doi.org/10.1038/133872c0
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DOI: https://doi.org/10.1038/133872c0
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