148 DATA ON HOG AND SAG OF MERCHANT VESSELS. 



appear to be excessive, to use his language. That remark went unchallenged in the meet- 

 ing in London. It may be so, but it does not sound as though it is correct. 



Mr. Francis B. Smith, Member: — I can say that is not correct. We found a differ- 

 ence of about 6 inches on 600-foot steamers. As has been remarked, by turning on the hose, 

 starting at Whitefish Point, about forty miles above the "Soo," and keeping it on and 

 cooling off the upper part of the vessel, the vessel would straighten out, so that when she 

 got down to the "Soo" locks she went through all right. 



The Chairman : — There might be some who would cavil at taking temperature obser- 

 vations, and be disposed to be skeptical as to temperature having much practical influence; 

 but after hearing the remarks of our friends from the Lakes, indicating that they can change 

 the draught of a vessel as much as six inches by playing a hose on the deck and reducing the 

 temperature, I think that practical men will admit that temperature differences are very 

 important and that the figures relating thereto may be accepted as reliable. 



Mr. Smith : — For fear the remark I made may give a wrong impression, I will say 

 that starting out our vessels were loaded to the full capacity of the canal before they left, 

 and when they got down to the locks they could not get through, because they were drawing 

 about six inches more water forward and aft than when they left the head of the lake. By 

 straightening them out, they were put back in position so that they could get through. 



Mr. Cornbrooks (Communicated) : — I transmit herewith the official weather bureau 

 reports for the dates and times given, as suggested by Professor Everett : — 



June 4-15, 3 P.M., 70° F., cloudy. 



The Chairman : — I am sure the Society desires to express its appreciation to the author 

 of this paper, Mr. Cornbrooks; and also to the author of the preceding paper, Mr. Gate- 

 wood, for their most interesting and valuable contributions. 



We have now reached the end of our morning program, and we will adjourn until two 

 o'clock this afternoon. 



