158 



TRANSACTIONS OF THE 



MEAN ANNUAL AND SEASONAL TEMPERATURES. 



The statement below shows the mean temperature, for each year, 

 for thirty-one years, and for the Spring, Summer, and Autumn, for 

 the past thirty-one years, and the mean Winter temperature for thirty 

 years. The coldest year, inferring from the mean temperature, was 

 that of 1880—57.7°; the warmest was 1864—62.8°; the mean average 

 for the past thirty-one years being 60.3°, showing the coldest to have 

 been 2.6° below the mean average, while the warmest year being that 

 of 1864, when it was 2;5° above the mean average for thirty-one years. 

 By careful study of the following table, one is struck by the slight 

 difference between the coldest and warmest year, as compared with a 

 thirty-one years average, generally not more than 3°. That is, we 

 might safely say that the mean temperature of any year, is not likely 

 to vary more than 3° from 60°, either way, between the hottest and 

 coldest year, as compared with the mean average temperature for 

 the past thirty-one years: 



* Tlie Winter tables are for the Winters from 1852-3 to 1SS2-3, both inclusive, 

 t Mean for thirty-one years. 

 J Mean for thirty years. 



