Mat 1891.] BOTANICAL SOCIETY OF EDINBURGH. 



Ill 



ness of the stem, and the top shoot of which, although 

 healthy, grew only 5 mches in the season. The results are 

 given in Table IVa. As the observations were at unequal 

 intervals, I have reduced the totals for each period to the 

 daily rate of growth. 



^Table IVa.— Comparative Increase in Height and Girth, 1888. 



A. Height. 



No. 



8. Abies Lowiana. 

 92. Do. 



91. Abies grandis, 



(i. Abies Douglasii, 

 26. Finns Pinaster, 

 64. Araucaria inibri- 

 cata. 



Ap. la 



to 

 Ap. 30. 



May 1 



to 

 May 14. 



May ].5 June 1 



15 days. 14 days 



Total, .... 

 Average per day, 



Inches. 

 

 

 

 

 



Inches. 

 

 

 

 

 50 







0-50 

 0-03 



to 

 May 31. 

 17 days 



Inches. 

 

 0-50 

 1-25 

 50 

 2-00 



0-25 



4-50 

 0-26 



to 

 June 16. 

 16 days. 



Inches. 

 1-00 





 1-75 





 2-50 



0-75 j 



6 00 I 

 0-37 



[ June 17 



to 



July 4. 



18 days. 



Inches. 

 350 

 2 00 



4 00 



5 75 

 8-00 



2-00 



25-25 

 1-40 



July 5 



to 

 July 16. 



July 17 Aug. 2 



to 

 Aug. 1. 



to 

 'Aug. 16 



12 days. 16 days. 15 days. 



Inches. 

 4-50 

 4-00 

 1-75 

 4'75 

 3-25 







18-25 

 1-52 



Inches. Inches. 



3 -.50 

 5-50 

 1-50 

 2-75 

 8-50 



1-50 



18-25 

 1-14 



1-50 

 3-75 

 1-25 

 0-50 

 2-00 







9-00 

 0-60 



Aug. 17 



to 

 Sep. 1. 

 16 days. 



Inches. 

 1-25 

 2-25 I 

 0-25 

 0-75 I 

 



0-50 I 



5-011 I 

 0-30 



Sep. 2 



to 



Oct. 1. 



30 days, 



Inches. 

 

 

 

 

 



15-25 

 18 00 

 11-75 

 15-00 

 21-75 



5-00 



No! — 



; 8. Abies Lowiana, 

 192. Do. 



]91. Allies grandis, 



6. Abies Douglasii, 

 j26. Pinus Pinaster, 

 64. Araucaria imbri- 

 cata, 



Total, . ~. \ ~ 

 Average per day. 



B. Girth. 



•10 -10 



•20 ; -10 



•05 j •lO 



•15 •OS 



•20 



•05 

 •10 

 •05 

 •05 



•10 



•10 







•10 











•20 

 •25 

 •20 

 •15 

 •10 



0^80 

 •044 



0^55 0-35 



•046 -022 



0^20 

 •013 



(■95 

 •059 



0-80 

 •026 



1^50 

 1^65 

 1-15 I 

 0^75 

 0^95 



0^60 



6^60 



The following are some of the chief results to be deduced 

 from the Table : — 



Increase in girth began much sooner and ended much 

 later than growth of the top shoot. This was true both of 

 the trees individually and as a whole. The difference must 

 amount to about two months. 



Dividing the growing season into three periods of two 

 months each, the following rough result is obtained :— 



Percentage of Increase. 



Girtli, 

 Top slioot, 



April and 

 May. 



35 

 6 



June and 

 July. 



35 



78 



August and 

 September. 



30 

 16 



April to 

 September. ' 



100 

 100 



