Abstract
In a letter in Nature of September 15, p. 416, Mr. Goodeve refers to a paper by Saidman and Dufestel1 on vision in the ultra-violet. Mr. Goodeve is probably unaware of a more recent paper by Saidman2 on the same subject, where evidence is given of vision down to the mercury line 3130. Furthermore, Saidman has pointed out another remarkable fact worthy of note ; that is, that vision at short wave-lengths is possible only in young people ; the limit of visibility recedes towards longer wave-lengths with increase in age.
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References
C.R., 182, 1173 ; 1926.
C.R., 196, 1537 ; 1933.
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FABRY, C. Vision in the Ultra-Violet. Nature 134, 736 (1934). https://doi.org/10.1038/134736a0
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DOI: https://doi.org/10.1038/134736a0
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