I] 



INTRODUCTION 



29 



three altitudes respectively. In 1909, the coldest days were 

 (1) February 12th, when - 2'2, -3'6, and -5'6 C. respectively 

 were registered, (2) March 4th, when 5'0 and 6'1 C. were 



1 The numbers in these columns represent the number of days on which 

 readings were taken. No readings were taken on Sundays ; and occasionally 

 readings could not be taken on other days, sometimes owing to accidents to the 

 kites and balloons, and occasionally owing to requests from the landowner 

 during the grouse-shooting season. 



