THE THERMODYNAMICS OF THE MARINE OIL ENGINE. 89 



The Chairman : — I am sure you will desire to thank Mr. Wentworth for his con- 

 tribution to our information on this subject. The discussion was slow in beginning, but this 

 indicates that the human mind is like an engine — it needs to be warmed up a little to get it in 

 good running condition. 



The next paper on our list and the last for today is No. 4, "Launching Data for a Bat- 

 tleship," by Naval Constructor J. G. Tawresey, U. S. N., Member. 



Mr. Tawresey presented his paper. 



