46 



PROCEEDINGS OF THE AMERICAN ACADEMY 



The squall entered New England at the western end of the Massa- 

 chusetts-Connecticut boundary about 10.10 a.m. (See Fig. 5.) Before 

 this it had been noted at Hensonville, Greene Co., N. Y., where the 

 rain began at 9.22, with a strong N.W. gust of wind, in which the 

 temiDcrature fell ten degrees (81° to 71°) in two minutes; the storm 

 seemed to pass centrally over the station, and its clouds were very 

 black and angry. Still earlier observations were made in New York, 

 as follows : Peterborough, Madison Co., loudest thunder at 7.22 in 

 the south, with light rain at 7.45 ; Palermo, Oswego Co., storm to 

 south with loudest thunder at 6.20 ; Constantia, Oswego Co., thunder 

 first heard at 6.45, continuing for two hours. The last two reports 



MEW/YORK / 



I ' ■■■'■■/ I '. . w > *s • ^; .■^-- 'v ■ 1 J^t ■■-■■.'•■. ■"■»■• 



CONNEA^TICUl 



mt; 



Fig. 5. 



are furnished by Prof. H. A. Hazen, U. S. Signal Service, and are 

 here mentioned with the rest to point out the probability that this 

 storm either began at a very unusual morning hour, or else was a sur- 

 vival from some storm of the previous afternoon. That they refer to 

 the squall here described admits of no question, as they correspond 

 closely to the position that it would have at their several times, as de- 

 duced by backward projection from the New England observations. 

 Returning now to our own records, we have Great Barrington, Mass., 

 rain at 10.40 with heavy clouds and continuous thunder. West Norfolk, 

 Ct., It. rain 10.30. Norfolk, Ct., rain by three observers 10.35, 10.40, 

 10.40, heavier to N. with high N.W. wind at 10.40. Winsted, Ct, 

 10.33, clouds rising hi N. ; It. rain at 11.08, with moderate N.W. wind; 

 shower nearly out of sight at 11.35. Collinsville, Ct., black thunder- 

 cloud to N. at 11.00, wind moderate S.W. shifting to brisk N. at 11.15, 

 It. rain at 11.25. Longmeadow, Mass., dark clouds rising in W. at 



