98 ECONOMICAL CARGO SHIPS. 



5 per cerit interest, is $3,938, and this would represent the total cost to the shipowner of 

 one ton of additional weight in the hull. Of course the assumptions on which this is based 

 would not be made good in practice, but how far they would come short would depend on 

 each individual case. 



The President : — As previous speakers have stated, Mr. Robertson's paper represents 

 a vast amount of work, the results being compressed into a comparatively small space. It 

 should be particularly helpful to the ship operators. I think the Society owes a sincere 

 vote of thanks to Mr. Robertson for compiling the data and putting it before us in such an 

 expressive way. The Chair therefore takes the liberty, on behalf of the Society, ol thanking 

 him for his contribution. 



The next paper is entitled "Non-rolling Passenger Liners — Observations on a Large 

 Stabilized Ship in Ser\nce, Including the Plant and Economies Effected by Stabilization," 

 by Mr. Elmer A. Sperry, Member. 



Mr. Sperry presented the paper. 



