The following is a paper by H. Aspden published in Physics Letters, v. 92A, pp. 165-166 (1982).
Commentary: This paper does not contain the substantive section of the paper that passed referee scrutiny. The author made a serious error in amending the paper at the proof stage, thereby unfortunately excising a proposed test technique that, on reconsideration, should have been left unaltered. This paper, as published, was later challenged and the author did, of course, concede the error.