PRESENT DAY STATUS OF THE ART. 67 



Thurston, R. H. 



Forms of Fish and of Ships. T. I. N. A., vol. 28. 

 Warrington, J. N. 



A System of Mathematical Lines for Ships. T. S. N. A., 1909. 

 Watts, Sir P. 



Speed Trials of H. M. S. Cossack in Deep and in Shallow Water. T. I. N. A., 

 vol. 51. 

 Wellenkamp, H. 



A New Method of Research Work on Fluid Resistance and Ship Propulsion. 

 T. I. N. A., vol. 50. 

 White, Sir W. H. 



On the Establishment of an Experimental Tank for Research Work on Ship 

 Resistance and Propulsion. T. I. N. A., vol, 46. 

 Wingfield, C. H. 



Influence of Depth of Immersion on the Distribution of Pressure over a Sub- 

 merged Moving Plate. T. I. N. A., vol. 43. 

 Woodward, J. J. 



Methods of Conducting Trials of Vessels. T. S. N. A., 1905. 

 Yarrow, A. F. 



Experiments to Test the Resistance of a First Class Torpedo Boat. T. I. N. A., 

 vol. 24. 

 Yarrow, H. E. 



Experiments on the Effect of Depth of Water on Speed, with Special Refer- 

 ence to Destroyers. T. I. N. A., vol. 47. 



DISCUSSION. 



The President: — The paper by Mr. Ernest H. Rigg, Member, on "The Determination 

 of the Resistance of Ships. Present Day Status of the Art," is now open for discussion. 



Professor Herbert C. Sadler : — I think we should thank Mr. Rigg for bringing the 

 matter of the resistance of ships before us in such concise form. The value of the paper, 

 to my mind, lies in the fact that he has pointed out what can be done with experimental 

 tanks. Some three years ago I saw a letter apropos to some experiments I had made myself 

 from a so-called practical shipbuilder, in which he made the statement that practical men 

 looked upon the results of experiments in model tanks as more or less of a joke, so it is 

 very refreshing to have such a man as Mr. Rigg pay the homage that he does to the results 

 of experiment tank work. It is needless to say that that practical shipbuilder was a ship- 

 builder on one of the rivers in the middle west. ( Laughter. ) 



The question of appendages, and all those things, their resistances can be determined, 



