Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons 'Please put in hand at once electros of the following figures in Mr. Swinton's paper (forthcoming in Proc. [Proceedings of the Royal Society]) on "Some Experiments with Cathode Rays" and deliver at latest to the Editor of Nature 29 Bedford Street, by Tuesday afternoon next. Figs. 1 to 4, 9, 11 to 13, 14 to 16, 20 & 21, 23 & 24. RHW'. [9 April 1897]