NATURAL HISTORY SOCIETY OF GLASGOW. 



135 



average, but also lower than in any previous year out of the 

 twenty-one. 



In the following small table I have collected all the instances in 

 which the three months seem to have been as cold as, or colder 

 than in those just past. It shows that there are only four other 

 instances in ninety-one years: — 



ME AX TEMPERATURE. 



If, instead of the three months, we confine our attention to the 

 two months which had the lowest temperature, we shall still find 

 very few cases in which the mean temperature of December and 

 January has been as low as in 1878-9. 

 instances: — 



The following are all the 



MEAN TEMPERATURE. 



Winter. 



Dec. Jan. 



Deg. Deg. 



1788-9 29-0 ... 33-4 



1794-5 368.. 23"9 



1796-7 30*4 ... 35-4 



Mean 

 Deg. 

 312 

 30 4 

 32 9 



Winter. 



Dec. 



Deg. 



1813-14 36-6 



1829-30 34 9 



187S-9 339 



Jan. 



Deg. 



26-9 



30-7 



32'2 



Mean 

 Deg. 



31-8 

 32 -S 

 33-1 



