Modern Photometry

Abstract

I WISH to clarify a somewhat confused account of some work of mine given in Walsh's “Photometry”, pp. 244–245 (London: Constable, 1926). Since the same mistake has also boon made by others heretofore and bids fair to become prevalent, it seems desirable to publish a correction. I do this not for the sake of finding fault, but to prevent, in so far as possible, the continued spread of mistaken ideas in regard to the subject matter in question. It is well known how errors once incorporated in a standard text are copied and re-copied without limit.