TRANSACTIONS OF SECTION a. 703 



last, from Vice- Admiral Lord John Hay, commanding Channel Squadron, enclosing 

 a copy of the tabular statements, forwarded therein, of the Trials of the Steering 

 Qualities and Turning Powers of H.M.S. 'Minatour ' and 'Defence.' 



I am. Sir, your obedient servant, 



Osborne Reynolds, Esqre., Robert Hall. 



The Owens College, Manchester. 



S. 8087. 79. 



Steering Qualities and Turning Powers of Screw Ships. 



' Minotaur ' at Vigo, 

 No. 165. 31«« July, 79. 



Sir, 



With reference to your letter of the 25th April, 77, S._ l^ff , addressed to 

 my predecessor, Vice-Admiral Sir Beauchamp P. Seymour, relative to the Steering 

 Qualities and Turning Powers of Screw Ships, I have now the honour to enclose 

 for the information of the Lords Commissioners of the Admiralty the results of 

 experiments that have, under my direction, taken place in^H.M. Ships ' Minotaur ' 

 and 'Defence,' together with a summary of the same— observing that these 

 experiments, so far as they go, seem to be useful as illustrating the views of the 

 British Association. 



I have, &c., 



John Hat, 

 To the Secretary of the Admiralty. Vice-Admiral Commanding. 



'3. On an improved Sounding Machine. By Professor Sir W. Thomson, 



M.A., F.B.S. 



[This machine was exhibited on the steamer ' Flying Cloud,' durmg an excursion 

 trip to the Worm's Head, on September 1. Various soundings were taken with it, 

 and the depths registered (from 12 to 21 fathoms) agreed closely with those marked 

 on the Admiralty Charts.] 



4. On the Incrustation of Steam Boilers. By W. Thomson. 



