290 



The Valley of Lake Ckatnplain, 



To the base of the Green Mountain range from the lake 

 will average about twenty miles. 



The prevailing rock is black slate, sand, and limestone. 

 There is every variety of soil, though a gravelly or clayey 

 loam predominates. There is a large amount of intervale or 

 bottom land on Otter, Winooski, Lamoille, and Missisco riv- 

 ers and some smaller streams. Springs and small streams 

 ;ire abundant, and for farming land it is the best tract in New 

 England of like extent. 



Climate. This may be seen by the following tables. 

 The average mean temperature for the last twelve years has 

 been — 



• January, 20.06 July, 69.87 



February, 19.01 August, 68.43 



March, 29.42 September, 58.87 



April, 42.07 October, 46.88 



May, 54.86 November, 37.17 



June, 64.72 December, 24.42 



Greatest heat, July 12 and 13, 1849, . 100^ 



Greatest cold, January 11, 1848, . — 25° 



Greatest range, .... 125° 



Average annual range, . . . 110° 



The thermometer rarely falls to 20° — often not lower than 



14°. But 17° may be about an average for the lowest point 



in winter. The lake at Burlington is usually closed about 



the first week in February, though it sometimes remains 



open during the winter, as was the case the last season. 



Rain. The average quantity of rain for the last twelve 

 years has been : 



January, 1.81 



February, 1.38 

 March, 2.21 



April, 1.84 



May, 2.95 



June, 3.25 



Least quantity of rain, 1849, 

 Greatest quantity, 1847, 



