Nov. 189-.'.] liOTANICAL SOCIETY OF EDINBURGH. 



511 



Eates of Girth-Increase. 

 («) Ascertained by counting rings (Sir E. Christison). 



(h) Eate in a grove at Eothiemurchus, estimated by 

 counting rings in a felled tree, the others, which are stand- 

 ing and which girth from 8 to 12 feet, believed to be of 

 the same age (Eev. Mr. M'Dougall). 



(c) Ascertained by girth measurements at 2| ft., the narrow- 

 est (Sir E. Christison, Mr. W. M. Leny, and D. Christison). 



(d) Five young trees planted at Dalswinton in precisely 

 the same circumstances as the larches (see under Larch), 

 varied in girth at 5 feet from 11^*0 inches to 12fo 

 inches in April 1893, and their rate for eight years was 

 between 1-.j2 and 1-58. 



(e) Ascertained in trees of known age (Conifer Conf. 

 Statistics, 1891). 



