IN a letter dated April 26 which appeared in NATURE of May 12, Mr. Stuhlmann, of Princeton University, U.S.A., describes some experiments which he has carried out on the photoelectric effect of incident and emergent light. I should like to mention that I have been carrying out some experiments on the same subject at the Cavendish Laboratory, Cambridge, and obtained the same effect as that described quite recently by Mr. Stuhlmann. The experiments were completed more than two months ago, and the results obtained described in a paper communicated by Sir J. J. Thomson to the Royal Society on March 25. In view of the appearance of the above letter they may be briefly described here.
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KLEEMAN, R. A Difference in the Photoelectric Effect caused by Incident and Divergent Light. Nature 83, 339 (1910). https://doi.org/10.1038/083339a0
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