270 BEPORT — 1859. 



A. communication was made on the subject to the American ambassador, 

 and copies of the Circular and Form have been forwarded by him to his Go- 

 vernment, with a request for such information as to the trials of the United 

 States Government vessels as can be furnished. 



Your Committee have given their attention to the question of recording 

 facts at sea. Upon examining the different logs which have been laid before 

 them, the}' found the particulars given so incomplete as to be unavailable for 

 data upon which to base calculations for scientific improvement. To remedy 

 this in future, they have, after careful examination and repeated discussion, 

 agreed to a form of log to be filled up on actual sea service. 



In arranging the particulars for the log, the Committee were materially 

 assisted by very comprehensive form-; transmitted by Admiral Paris, of the 

 Imperial French Navy, and also by a letter from him, giving very circum- 

 stantial information on all the points to which scientific inquiry might be 

 directed. 



The object of it is to supply an authentic record of actual performance at 

 sea, in order to compare it with the performance at the measured mile. It 

 forms, in fact, a sequel to the returns proposed to be made on the test trials 

 of vessels. 



The Committee have had log-books* prepared for the use of steam-ship 

 companies ; and as they include all the useful particulars at present recorded 

 in the ordinary ship's log, the Committee anticipate concurrence in its general 

 adoption. 



Accompanying the log-books are loose Return sheets, which the commander 

 and engineer are invited to fill up from the log, and to return for the use of 

 the Committee. 



Your Committee beg to lay before the Association a statement of the 

 result of their endeavours to obtain a record of the performances of steam- 

 vessels. 



The first is a complete set of returns of the performance of the Chester 

 and Holyhead Company's steam-boats, plying between Holyhead and Kings- 

 town, presented by Admiral Moorsom. They consist of — 



I. 1. Return of the performances of the Chester and Holyhead Com- 

 pany's steam-vessels, under trial for a standard test. 

 2. Return of the speed and consumption of fuel of the steam-boats, 

 under regulated conditions of time, pressure, and expansion, 

 for given periods (1848 to 1850). 

 S. Return of the speed and consumption of coal of the express and 

 cargo boats, under regulated conditions of time, pressure, and 

 expansion, from January 31st, 1857 to 31st December, 1858. 



4. Verification of consumption of coal, from January 1st, 1857 to 



December 31st, J 858. 



5. Abstract of time of renewal of boilers, miles run, consumption of 



coals per mile, <Src. 



6. Return of shortest passages. 



7. Return of mileage run, and expense per mile. 



II. Return of particulars respecting theChester and Holyhead Company's 

 steam-vessels ' Anglia,' ' Cambria,' ' Scotia,' and ' Telegraph,' 

 on their trials, filled in to the Committee's form of return. 

 III. 1. Return showing the result of experiments with the steam-yacht 

 'Undine' on the measured mile at Greenhithe, July 6th, 1858. 

 2. Ditto ditto, on passage from Holyhead to the Mull of Cantyie, 

 July 29th and 30th, 1858. 



* The log-book is arranged in precisely the same form as the return from Log. See 

 Table opposite case 274. 



