COEFFICIENT CONSTANT AND OTHER COEFFICENTS VARIED. 7 



We have had other experiences with false bottoms, and we find, in towing these models, 

 that a model which has a resistance of only a few pounds exercises a very strong upward 

 suction on the bottom, when it is close to the bottom. We found it .necessary to use 15-inch 

 I-beams, quite stiff, placed 10 feet apart, so as to make sure that the bottom does not rise up 

 and attempt to meet the model. The upward suction upon the bottom, resulting from a 

 comparatively small horizontal pull, is surprising. This is caused by stream-line pressures, 

 which are balanced as regards resistance, but by no means balanced as regards suction on the 

 the bottom. 



Mr. Stevenson Taylor : — ■ I move a vote of thanks to Naval Constructor Taylor for his 

 interesting paper. 



The Chairman : — Gentlemen, you have heard the motion. I am sure there is no ob- 

 jection. Those in favor say Aye; opposed, No. It is a vote, and the thanks of the Society 

 are extended to Mr. Taylor. 



The next paper on the program is by a gentleman to whom we are indebted for a great 

 many valuable papers, and this is a further favor to the Society. We will now have the paper 

 entitled, "Resistance of Bilge Keels," by Professor C. H. Peabody, Member of Council. 



Professor Peabody presented the paper. 



