ON STEAMSHIP PERFORMANCE. 287 
With a view of obtaining, with greater facility than heretofore, returns of 
performances, as well as the dimensions and particulars, of ships, engines, and 
machinery, your Committee have adopted a form of pocket-book, or “ En- 
gineers’ Pocket Log,” which contains a greater number of details than were 
included in their previous “forms of returns.” This log is so arranged that 
the returns can be removed from the case when filled up, and the blank form 
inserted. Each book is furnished with a pocket to receive and preserve the 
indicator diagrams or “ cards.” 
Although these books have only recently been issued, considerable numbers 
of them are in course of being filled up by the engineers of ocean-going steam- 
ships; and arrangements have been made for the regular transmission of 
these returns from each ship during the next twelve months. Since the 
issuing of these Pocket Logs, your Committee have received particulars of 
between 30 and 40 first-class ocean-going screw steamships, which were, 
however, received too late to be properly tabulated so as to accompany the 
present Report. These returns are being examined and arranged for pub- 
lication. The Engineers’ Pocket Logs have been freely circulated and well 
received, and they promise to yield a large amount of valuable information 
to the Association. 
A list of the particulars asked for will be found in the Appendix. 
The particulars of the ‘Great Eastern’ having been already published, the 
logs of her performances on her Transatlantic voyages have been regularly 
supplied to your Committee since she’ has been refitted and placed upon the 
North American service. 
These logs have been collected, and are given in the Appendix to the 
present Report. 
Performances of Vessels under Sail.—In compliance with the recommenda- 
tion of the Council of the Association, your Committee have succeeded in 
obtaining promises of copies of the logs or returns of the performances of several 
of thelargestsailing-ships belonging tothe Australian, India, and China Packet 
Services, and to this end special observations are being made; and it is 
hoped that the results of the labours of those who have undertaken the duty 
of supplying your Committee with these returns may be included in the next 
Report in such a form as will render them available for comparison with the 
performances of full-powered and auxiliary steamships performing similar 
voyages. 
Your Committee have received from the Earl of Durham the logs of the 
sailing schooner-yacht ‘ Beatrix,’ on her Mediterranean voyages. The dimen- 
sions and particulars of this vessel, together with scale of displacement, have 
also been received, but not in time to be included in the Report. 
Your Committee have been promised the particulars of some auxiliary- 
powered ocean steamships. 
The Committee purpose to act upon a suggestion made to them, of forming 
a list of the Engineers of the several classes employed in the mercantile steam 
service, who have, with the sanction of the owners, supplied your Committee 
with returns of the performances of ships under their charge, to which re- 
ference may be had by such members of your Association as are interested 
in the subject, and with a view to afford opportunities for the advancement 
of such Engineers as have shown the greatest amount of scientific ability in 
connexion with their calling. 
Your Committee have determined to act upon a suggestion by which the 
