It may not be impertinent to add, that the ba- 

 rometers at Selborne stand three-tenths of an inch 

 below the barometers at South Lambeth ; whence 

 we may conclude that the former place is about 

 three hundred feet higher than the latter ; and with 

 good reason, because the streams that rise with us 

 run into the Thames at Weybridge, and so to Lon- 

 don. Of course therefore there must be lower 

 ground all the way from Selborne to South Lam- 

 beth ; the distance between which, all the windings 

 and indentings of the streams considered, cannot be 

 less than a hundred miles. 



LETTER CV. 

 To THE Honourable Daines Barrington. 



Since the weather of a district is undoubtedly 

 part of its natural history, I shall make no further 

 apology for the four following letters, which will 

 contain many particulars concerning some of the 

 great frosts, and a few respecting some very hot 

 summers, that have distinguished themselves from 

 the rest during the course of my observations. 



As the frost in January 1768 was, for the small 

 time it lasted, the most severe that we had then 

 known for many years, and was remarkably injurious 

 to evergreens, some account of its rigour, and reason 



175 



