112 Contributions to Meteorology. 



ary was scarcely ever equalled for the low reading of the thermo- 

 meter, and indicated 9.21 degrees lower than the mean tempera- 

 ture of January for the last seven years, and is the coldest Janu- 

 ary on record here. The mean temperature of the month was 

 4.05 degrees. 



February was the warmest February on record, the mean tem- 

 perature being 21.61 degrees, and 8.30 degrees higher than the 

 mean of February for the last seven years. The highest tempe- 

 rature observed in February was 46.1 degrees, which exceeds by 

 5 degrees the mean highest temperature of the month of February 

 for the last seven years. 



The lowest temperature was observed on the 18 th January, 

 and was — 31.8 degrees (below zero), and the highest reading 

 of the thermometer was on the 14th of July, indicating 98 

 degrees ; making a yearly range of 130.5 degrees, which is less 

 by 6.2 degrees than the greatest absolute range for the past 

 seven years. July was the warmest month, the mean tempera- 

 ture being 71.57 degrees, which is 3.21 degrees less than the 

 mean annual temperature for July for the last seven years. The 

 mean temperature for each month was as follows : January 4.05 

 degrees, February 21.61, March 23.79, April 37.19, May 51.90, 

 June 61.44, July 71.57, August 65.07, September 57.47, October 

 44.19, November 33.69, and December 14.96. 



The cold terms of January were felt generally in Canada, and 

 through the Eastern and the Northern States. On the 18th Janu- 

 ary, at Missisquoi, the thermometer attained a minimum of 42 

 degrees below zero. This fact was kindly furnished me by Mr. 

 J. C. Baker. At Sherbrooke, my friend Dr. Johnston writes me, 

 the greatest cold observed was on the morning of the 24th Janu- 

 ary, when the mercury in the thermometer was frozen, in those 

 instruments using it ; and Professor Miles of Lennoxville Col- 

 lege observed his spirit thermometer at 44 degrees below zero ; 

 while at Missisquoi on the 24th Mr. Baker's record showed a 

 temperature of 24 degrees below zero, and at this place on 

 the 24th day the mercury stood at 29.6 degrees below zero ; 

 the spirit thermometer stood also at the same temperature. 

 At Watertown, N. Y., on the 18th, the temperature was 36 

 degrees below zero ; and on the 24th, at the same place, frozen 

 mercury was carried about in a vial for exhibition. At Harvard 

 College, at 7 a.m. on the 24th, the thermometer indicated a tem- 

 perature of 10° — (below zero), at Albany it reached 30° — , at 



