SHIPBUILDING INDUSTRY IN THE UNITED STATES. 223 
In conclusion, I wish to thank the gentlemen who have contributed so much of value 
in the discussion; any value that the paper may possess is greatly enhanced by this very full 
discussion. 
I also wish to again thank you all for the more than kind reception you have accorded 
to the paper. 
THE CHAIRMAN :—I am sure that I voice the feeling of this meeting when I offer Mr. 
Rigg the thanks of the Society for presenting this matter before us. 
We will now turn to our last paper, No. 12, “Selection of the Best Kind of Propelling 
Machinery,” by Mr. James L. Ackerson, Member. In the absence of Mr. Ackerson, this paper 
will be read by Mr. John E. P. Grant. 
Mr. Grant presented the paper. 
