ON STEAM-SHIP PERFORMANCE. 191 



Captain Hope, R.N. 

 Captain Mangles. 

 T. R. Tufnell. 

 "William Froude. 

 John Elder. 

 David Rowan. 

 J. McFarlane Gray. 



Lord C. Paget, M.P., C.B. 



Lord Alfred Paget, M.P. 



Lord John Hay, M.P, 



The Earl of Gifford, M.P. 



The Marquis of Hartington, M.P. 



Viscount Hill. 



The Hon. Leopold Agar Ellis, M.P. 



Captain Ryder, R.N. 



Your Committee re-elected Admiral Moorsom to be their Chairman, and 

 at his decease the Duke of Sutherland succeeded him. 



Your Committee having held monthly meetings, and intermediate meetings 

 of a sub-Committee, presided over by the Chairman, beg leave to present the 

 following Reports : — 



At the last meeting of the British Association, after the Committee's Report 

 had been presented, Admiral Moorsom read a paper before the Mechanical 

 Section on the Performance of Steam Vessels, and a discussion ensued which 

 demonstrated the great want that is felt by men of science, both in England 

 and in other countries, of definite knowledge based on actual experiment re- 

 specting the resistance offered by vessels of various sizes and types, to being 

 drawn through the water. As the means of trying such experiments could 

 only be satisfactorily obtained from a Government having every description 

 of vessel in its service, your Committee determined urgently to renew their 

 applications to the British Admiralty, that that body should, for the benefit 

 of science generally, conduct a series of experiments ; and to state that the 

 Committee were even prepared to advise upon or conduct such experiments, 

 if the Admiralty so desired. 



The Chairman accordingly communicated with the First Lord of the Admi- 

 ralty, repeating the various arguments hitherto advanced, with concise state- 

 ments of the general nature of the detailed experiments deemed necessarj'', 

 and which are briefly as follows : — 



1. The specific resistance of certain ships selected as types, and of the fol- 

 lowing displacements, viz.,— about 1000, 2000, 3000, 4000, 5000, 6000, 

 7000 tons, and upwards. Such resistance under traction being measured by 

 dynamometer, and under the three following conditions ; — 



(1.) Of the hull when launched. 

 (2.) Ditto with machinery on board. 

 (3.) Ditto when ready for sea. 



2. The thrust of the screw, measured by dynamometer, when propelled by 

 steam under the two last of the above three conditions, and under similar 

 circumstances of smooth water and calm. 



3. Full particulars of the dimensions and form of the ships, of the boilers 

 and furnaces, of the engines, and of the propeller. 



4. Detailed particulars of the performances of the same or similar ships in 

 snooth water at the measured mile, with the particulars and conditions set 

 forth in a Form of Return which accompanied the memorandum, or any other, 

 more comprehensive or effectual, that might be given. 



5. The actual performance of the same or similar vessels at sea, with the 

 particulars and conditions set forth as aforesaid. 



Your Committee would remark in passing, that from the date of their first 

 appointment, they have not ceased, on every available occasion, to press this 

 subject upon the attention of the authorities ; but, up to the present time, 

 your Committee are not aware that any experiments of the kind have been 

 undertaken. 



In the Report presented to your Association at Oxford, it is stated that a 



