Nov. 1892.] BOTANICAL SOCIETY OF EDINBURGH. 



467 



1. Ft ATE OF GiKTH-InCREASE IN OaKS OF KNOWN AgE. 



(a) Oak ut Stratton, Norfolk, planted in 1720 by Mr. 

 INIarsham. 



"Perhaps the growth was helped by digguig a large circle 

 round it in several winters, and in other years having that 

 circle covered with greasy pond mud." He also washed the 

 stem frequently in dry seasons. 



(h) Oak at same place, known from a Deed to have been 

 planted in 1580. 



Date. 



Girth. 



Ft. In. 

 1760 15 23 

 1778 16 3i 



Period. 

 Years. 

 180 

 IS 



Increase. 



In. 



1825 



12S 



Eate. 

 In. 



1 -01 at 5 ft. 

 0-70 do. 



Mi: Marsham. 

 do. 



(c) English oaks measured in 1889 by Mr. Collins, 

 Trentham, Staffordshire. Age accurately known from 

 records on pillars of the dates of planting, and tested by 

 counting the rings on many felled specimens. 



(d) "Many oaks at Cammo, Midlothian, planted 150 

 years ago, and age proved by counting rings in felled trees, 

 vary from 9 to 10 feet in girth, giving a rate of from 0"72 

 to 0-80, and for the largest (11 feet girth) of 0-8 G. Hate 

 of the latter confirmed by two years' measurement, showing 

 0-75 still."— Sir R. C, 1880. 



