Mar. 1892.] THE BOTANICAL SOCIETY OF EDINBURGH. 323 



The total aniouiits were 2G5 in 18S7, 2-80 in 1888, 

 3-40 in 1889, 4-25 in 189.0, and 3-00 in 1891. 



August. Records of 0*00 or 0*05 occur thirty-six times ; 

 of 0-30 and upwards eleven times, confined to the three 

 species — Ah, yramlis, five times, Ah. Loiviana four times, 

 Larix twice. 0'60 was attained twice and 0"50 once by 

 Ah. Lawiana, and 0*50 once by Ah. grandis. 



The total amounts were 3-00 in 1887, 2-10 in 1888, 

 3-30 in 1889, 2-65 in 1890, and 3-10 in 1891. 



Septa iihci\ Records of 0*00 or O'Oo occurred sixty-five 

 times, or about two-thirds of the whole ; of 0*30 or upwards 

 five times, in Ah. graiidis three times, in Ah. Lowiana twice ; 

 of 0"20 and upwards fifteen times, — eight in Ah. Loiviana, 

 four in Ah, graiulis, and once in Ah. Douglasii, P. excclsa, 

 and Larix. No less than half an inch was attained once 

 by Ah. grandis in this last month of the growing season. 



The total amounts were O'So in 1887, 110 in 1888, 

 1-35 in 1889, 1-90 in 1890, and 1-85 in 1891. 



b. Monthly Proportion of Girth-increase in twenty Coniferse, 

 collectively. 



Table XI. Percentage of Aggregate jMonthly Girth-Increase 



OF TWENTY CoNIFERJi IN FIVE YEARS, 1887-1891. 



The result for the five years is that the chief growth was 

 in June and May. Together they account for half the total 

 increase, June having no great advantage over May; July 

 claims, a fifth of the whole, August a sixth, September a 

 twelfth; and April a twentieth. 



. . Besides the general average, it is desirable to take that of 

 several groups. 



