342 



TRAXS.ACTIOy.S AND rUOCEEDINGS OF [Sess. LVI. 



years 1887 to 1890 for general purposes on a large number 

 of young trees, but as the exigencies of the garden service 

 required that the particular trees referred to should be 

 transplanted, advantage has been taken of the opportunity 

 to record the effects upon the trees, especially on the girth- 

 increase. 



No. 67. Acer Psciulo-platanvs. A handsome, symmetrical 

 tree girthing 6'75 inches at 3 feet from the ground, trans- 

 planted in spring 1887. In that year it produced very few 

 but large healthy leaves, and in each succeeding year the 

 foliage increased, although it is still deficient. 



The figures iu the taUcs represent hundredths of an inch. 



Tn estimating the evident deficiency in girth-increase after 

 transplantation, I have no measurements on quite so young 

 a tree of the same species for comparison, but one girthing 

 8-45 inches at 5 feet up increased almost an inch in 1887, 

 and at the rate of 110 inch for five years afterwards. It is 

 evident therefore that the increase in No. G7 has been 

 greatly retarded, although the tree has apparently been 

 perfectly healthy, for at least five years, the total increase 

 in that period being only I'SO, and the annual rate O'SO. It 

 is worthy of note also that by far the greater proportion of 

 increase occurred in the first half of the growing season 

 for the first three years, and more than half of it in the month 

 of June, while no increase took place in April, August, or 

 September. In the last two years growth in the second half 

 season became equal to or greater tlian that in the first, and 

 increa.se appears in August. There is also a gradual increase 

 in the uiriount year by year, exce])t a slight decline in 1891, 

 due proliably to the very backward season. 



No. 61. Qurrciis rvhra. A handsome young tree, girthing 

 5-40 inches at 3 feet from the grf)und, transplanted in spring 



