280 



TRANSACTIONS OF THE 



Mean Average Autumn Temperature. 



The average temperature for the Fall season indicates the Fall of 1853 

 as being the warmest, 69.0°; that of 1881 and 1886 were the coldest, judg- 

 ing from the average temperature, 58.5°. The average mean temperature 

 for thirty-four years past was 61.4°, showing the average of 1853 to have 

 been 7.6° above the mean average, and that of 1881 to have been 3.1° below 

 the mean average temperature for the past thirty-four years: 



