262 



Dr Christison on the 



The three healthier trees grew at the rate of about a foot 

 yearly, while the rate of No. 25 was only half as much. 

 There was no sign of diminished vigour in upward growth 

 with increasing age, as the rate was about the same in the 

 first two and in the last seven years, in the two trees in 

 which it was ascertained. 



The individual range was slight, the highest being from 

 1"15 to 0^55, and the lowest, from 1-85 to 1'05. The aggre- 

 gate range was considerable — from 6^00 in 1878 to 3'65 in 

 1883. 



The species withstood the first two years of the first de- 

 pression with little or no loss of girth-increase ; and in the 

 third, althougli all suffered, it was only the weakest, No. 25, 

 which showed a heavy decline. All of them rallied in the 

 subsequent year, but only to fall again in 1883 to the abso- 

 lute minimum. From this depression there was a progres- 

 sive recovery in 1884 and 1885 ; but in 1886 and 1887 they 

 were again the victims of a heavy decline. 



Cedrus Deodar a. 



