288 REPORT—1862. 
performances of some steamships, which are at present withheld, may in 
future be supplied for the use of the Committee, viz., that such returns shall 
be published under a distinguishing number, instead of publishing the name of 
the vessel, her builders, and the constructors of her machinery, and that the 
latter particulars shall only be disclosed with the consent of the owners. 
Your Committee continue to receive from steamship-owners and engineers 
invitations to be present at the trials of steamships. 
The sum of £150, voted by the Council of the Association to defray the 
expenses of your Committee, has been expended and slightly exceeded. 
Your Committee have thought it desirable to add the following particulars 
of items to be included in a form of return to be printed, and circulated with 
the logs and forms of returns issued by the Committee. 
Position of centre of gravity of vessel. 
Position of centre of buoyancy. 
Position of metacentre for rolling. 
Position of metacentre for pitching. ; 
Wedges of immersion and emersion at an angle of 73, or 15, or any other 
number of degrees. 
Approximate radius of gyration of vessel about longitudinal axis, 
Approximate radius of gyration of vessel about transverse axis, 
Number of rolling oscillations per minute. 
Number of pitch oscillations in a minute. 
Under given circumstances, those an- 
Angles through which vessel rolls. gles to be measured not by a pen- 
Angles through which vessel dulum, plummet, or spirit-level, but 
pitches. | either by observing the horizon or 
the stars, or by a gyroscope. 
Length, height, period and direction of waves at time of experiment, sail 
carried, indicated power at time of experiment, direction and force of wind. 
A lithographed sheet has been added to the Appendix, containing nine 
indicator diagrams and a scale of displacements, as your Committee considered 
those elements to be necessary for the proper consideration of the returns and 
particulars furnished to them. : 
The other indicator diagrams, which have been received by your Committee 
too late to be embodied in the present Report, may be seen by any one inter- 
ested therein on application at the Offices of the Committee. 
The thanks of the Association are due to Colonel Paradis, the Technical 
Director of the Austrian Lloyds’ Company, who, at the request of the Com- 
mittee, caused the information in the Appendix relating to the vessels of 
this Company to be compiled expressly for insertion in the present Report. 
The thanks of the Committee are also due to— 
The Lords Commissioners of the Admiralty, the Secretary of the Admiralty, 
the Comptroller of the Navy, and the Engineer-in-Chief of the Admiralty, 
for such information as they have furnished, or permitted to be supplied 
to your Committee, relating to the trials and sea performances of vessels 
in Her Majesty’s service. 
To the heads of the various Departments of the Service, and to the officers 
under them, for the facilities afforded to your Committee in obtaining 
such information as the rules of the Service allow, or which have been 
specially permitted to your Committee. 
To the Officers of Her Majesty’s Navy, by whom returns haye been fur- 
