9-i TRANSACTIONS AND PROCEEDINGS OF THE [Sess. lxii. 



The growth was fair up to 10 years of age, much quicker 

 up to 20, somewhat slower up to 30, and then considerably 

 slower up to 64, the age of the tree. The girth at the 

 stool measured 1249 mm., or 4 feet 2 inches. 



H. Common larch {Larix europcca, DC.) grew beside F, 

 on the N. side of the Dee, and the section was taken 

 34 feet above the ground. As in the case of F, it is 

 difficult to learn the conditions of light and shade of this 

 tree. 



The E. radius measured 91 '5 mm. 

 „ S. „ „ S6-0 „ 



,, W. „ „ 79-0 „ 



„ N. ■„ „ 79-0 „ 



The curve is of the same nature as that in F, but the 

 growth had been slower. The tree at the section was 

 70 years old, and measured only 527 mm., or 1 foot 

 9 inches in girth. 



The diagrams referred to in the text were used to 

 illustrate the reading of the paper ; the only one repro- 

 duced here is that showing the curves of annual girth- 

 increment. 



The Diameter-increment of the Wood of Coniferous 

 Trees at Braemar in relation to climatic conditions. 

 By E. TuiiNiiULL, B.Sc. (With Plate.) 



(Read 13th January 1898.) 



The first part of this paper, read at the December 

 meeting of the Society, dealt with the measurements of 

 the radii, average diameters, and girths of the wood of 

 coniferous trees which were blown down near Braemar by 

 the November gale of 1893. 



Curves of the continued increase of diameter and girth 

 were drawn for each tree, so as to show the increase in 

 relation to age, and since the paper was read, curves for 

 the increase of area have been added. 



There were eight sections examined, including larch, 

 Scots pine, and Norway spruce, and in every case the 



