326 TRAXSACTIOXS AND PUOCEEDIXOS OF [Sess. 



Species irhich show the largest Pro^wrtiovs in the 

 different Months. 



Ajyril. The most reliable instance of a large April pro- 

 portion is in the healthy, (| nick-growing Craigiehall Pioius 

 anstriaca, where it amounted for the quinquennial period to 

 17 '5 p.c. of the total increase. In the Botanic Garden 

 specimens it was only 3 p.c, but this tree is not thriving. 

 Large proportions are likewise shown in the three old 

 Armicarias, 9, 13, ajid 23 p.c, but they were decaying trees, 

 and the two young trees yielded only 3 p.c. between them. 

 Species which show a comparatively high result in all their 

 examples are Fimis excelsci, 8, 8*5, 10'5 p.c ; Cu2)ressus 

 Lencsonietna, 6, 6"5, 9 p.c. ; the single Thvja and Betinosijora, 

 11 p.c. each. On the other hand, the three trees of 

 tSerpwiei and of Ceelrns give only 2*5, 3, 4, and 2, 3, 3 p.c. The 

 April proportion exceeded 3 p.c in twenty-one and 5 p.c. in 

 sixteen of the thirty-four trees. 



Examples of a large incidence of species or individuals on 

 one of the three chief growing months are not so common 

 here as in tlie Deciduous group, as in the latter the propor- 

 tions are not so equally diffused over the months. 



Ma,y. Only two trees reach 40 p.c, — a Cypress with 40, 

 and an Arcmcaria, with 44*5 p.c. The most reliable example 

 of a species with a low proportion is C. Dcoelara, whose three 

 trees yield 6"5, 12, and 14f) p.c. 



June. Abies Hooheriana, with 42 "o, is the only tree of the 

 younger group that reaches 40 p.c. ; and in the older group, 

 two of the Scqnolas, with 41 and 43 (the third being well 

 u]) with 34\5), are the sole representatives. C. Deoelara is 

 again low, with 15*5, 21'5, and 21*5 p.c. 



Jul//. Xo tree attained 40 p.c, and only three, all of the 

 old group, reached 30 p.c. Two of tliese were Deodars, the 

 third of the species being close up, with 29 p.c. The highest 

 of the younger trees is Ab. Iloohriana , with 27 p.c. 



Auf/iist. A Deodar, with 33*5, stands at the head, and no 

 other tree reaches 30 p.c. The contrasts of species are more 

 marked in this month. The three trees of C. Deodara yield 

 27, 28, and 33*^ p.c; the three of Al. Lenoiana 22-5, 22*5, 

 and 24'5 p.c; the fonr of Aravcaria only 0, 5, 7"5, and IG ; 



