﻿REGISTER OF THE THERMOMETER FROM 1821 TO 1856. 



231 



3° below the meau constitutes a cold year. 



3° above the mean constitutes a wann year. 



This small difference we find distributed over all the months. 



Range of the Mean Temperature of the Months in different Years. 



The order in which the months arrange themselves in regard to variable mean tem- 

 perature is, December greatest, next February, then January, March, June, May, 

 November, July, April, September, August, October. 



July is the warmest month. 



January is the coldest month. 



October nearest the mean temperature of the year, being 2°.4:2 higher. 



April next nearest the mean temperature of the year, being 2°.92 lower. 



Mean Temperature of three Winter Months. 



Mean Temperature of three Spring Months. 



December, 

 January, 



February, 

 Mean of Winter, 



30.58 

 27.03 

 27.61 

 28.41 



March, 

 April, 

 May, 

 Mean of Spring, 



35.52 

 45.74 

 56.37 



45.88 



