Proceedings.] CORRESPONDENCE ON TORPEDO-BOATS AND YACHTS. 165 ment. With regard to running engines at high speed, it was not Mr. Thornyeustomary to give large marine engines sufficient bearing surface to croftallow them to continue to run very fast, and the size of ports and passages were also not adapted to any considerable increase of speed without showing loss on the diagrams. Correspondence. Nr. BENJAMIN BAKER, having known the Author and his equally &fr. Baker. energetic partner, Mr. J. Donaldson, from the commencement of their career, was surprised rather at the shortness of the Paper, than at the amount of information communicated. It would be impossible, in the limits of 20 pages, to give a tithe of the highly interest,ing and valuable data accumulated by Messrs. Thornycroft and Donaldson during the past ten years, but he hoped that, in closing the discussion, Mr. Thornycroft would furnish a little additional information on some important points. Firstly, he thought ,it desirable that the " speed and power" curves of the first and second-class torpedo-boats should, if possible, be given, so that the members might se0 when and how the reduction in resistance referred to by Mr. White manifested itself. It would be interesting, also, if the values of the Admiralty constant i n Table IT. were given, not only for the maximum speed, but also for the speeds a t which the constant had the lowest value. Secondly, he would suggest that some typical indicator diagrams taken from his engines at high and low speeds should be appended, and finally, that 166 CORRESPONDENCE ON TORPEDO-BOATS AND YACHTS. pfinutes of Mr. Baker.
