A SUMMARY OF METEOROLOGICAL RECORDS. 141 



Wind (in Miles). 



Total movement, 1,320,668 



Greatest annual movement, 1908, 63,571 



Least annual movement, 1894, 36,257 



Mean annual movement, 52,827 



Greatest monthly movement, April, 1908, 8,208 



Least monthly movement, Jul}', 1894, 1,109 



Mean montlily movement, 4,402 



Greatest daily movement, April 8, 1909, 705 



Least daily movement, Sept. 29, 1894, March 7, 1890, Jan. 6, 



1904, 



Mean daily movement, 145 



Maximum pressure per square foot, 43 pounds, = 93 miles per 



hour, Sept. 11, 1895, 3 p.m. 



Weather. 



Mean cloudiness observed, per cent., 52.2 



Total cloudiness by the sun thermometer, per cent., . . . 48.3 



Number of clear days, 2,766 



Number of fair days, 3,073 



Number of cloudy days, 3,291 



Gales of 75 or more miles per hour: 1889, Dec. 26, 76, N.W.; 1893, 

 Aug. 29, 87, S.W.; 1895, Sept. 11, 93, N.E.; 1898, Sept. 7, 78, S.W.; 

 Dec. 4, 75, E.S.E.; 1900, Feb. 22, 78, W.N.W.; 1907, July 20, 81, W.; 

 1908, April 11, 80, N.N.W.; 1911, Dec. 28, 79, W.N.W. 



The following summary was abstracted from meteorological 

 records taken in Amherst prior to the establishment of the 

 meteorological observatory at the college in 1889. 



The records from 1836 to 1883 are from the observations of 

 the late Prof. E. S. Snell of Amherst College. These records 

 were taken at his house, about one and a half miles south of 

 the location of the meteorological observatory at the Massa- 

 chusetts Agricultural College, and at practically the same ele- 

 vation above sea level. 



The precipitation records are believed to be fairly comparable 

 with the records of this station, although perhaps slightly 

 affected by the difference of topography surrounding the two 

 places. As Professor Snell changed his time of taking tem- 

 peratures, and used different methods of deducing the mean 

 temperatures in conformity with the current practices at dif- 



