SESSION OF THURSDAY AFTERNOON, DECEMBER 11, 1913. 47 



Associates (2). 



Andrew W. Carmichael, Assistant Naval Constructor, U. S. Navy, Navy Yard, Nor- 

 folk, Va. : 

 William L. Rodgers, Captain, U. S. Navy, Naval War College, Rhode Island. 



The Chairman : — Gentlemen, you have heard these names recommended by the Coun- 

 cil for election to membership as mentioned. 



Mr. Francis T. Bowles^ Past President: — I move that they be elected. 



Motion seconded and carried. 



The Chairman : — ^The next paper to be considered is No. 6, w^hich is entitled "A Sub- 

 stitute for the Admiralty Formula," to be presented by E. A. Stevens, Jr. 



Mr. Stevens presented the paper, and in connection therewith said: In Table 11, Plate 

 45, you will notice at the bottom that the Utah is mentioned twice, one time with recipro- 

 cating engines, the other with turbines. The one with turbines gives the actual results 

 from the trial trip of this ship, while the one with reciprocating engines is on the assump- 

 tion that this ship had been fitted with reciprocating engines and propellers of equal efficiency 

 to the Delaware. The curves on Plate 32 for the Utah are from the data on Table 9, Plate 

 43. The indicated horse-power of this ship, as stated in the footnote on page 51, was taken 

 front her effective horse-power divided by the propulsive coefficient of the Delaware, thus 

 doing away with any error due to propulsive efficiency. I might also state that the degree of 

 accuracy of the calculations is only that which can be attained on a 10-inch slide rule, as it 

 would have been impossible, with the time at hand, to have accomplished this work in any 

 other way. 



