Mar. 1802.] THE BOTANICAL SOCIETY OF EDIXBURniT. 313 



of the species is not so well confirmed, are two of the four 

 specimens of Acer, with 37 and 43 p.c. ; Carpinus, with 37 

 p.c. ; Frmms, with 38 p.c; and, because it is single of its 

 species, Crataegus, with 36-5. The very high proportions of 

 55 p.c. in Tilia Xo. 18, and 51 p.c. in Behda No. 5, both, 

 older trees, are quite contradicted in the younger specimen,? 

 of their species. 



Thus, twenty-three of the fifty-eight had upwards of 35 

 p.c. this month, and two increased more than a half of their 

 total amount in it. 



August. Liriodendron tidipifera is decidedly at the head, 

 with 43 p.c; No. 76, Populus fastigiata, alone approaches it, 

 with 38 p.c Thirteen others reach between 25 and 30 '5 

 p.c, but as none of them indicate a special preference of the 

 species for August, it seems unnecessary to detail them. 



September. Liriodendron stands best in this month also, 

 with 13 p.c, CratmgiLS coming next, with 11*5 p.c, both 

 reliable. Three, Salix, Quercus Rohur, and Fagus yield 1 

 p.c, but the two latter are old trees of slow growtli. No. 

 86, Carpinus, with 9 p.c, Cgtisus and Quercus Oerris, with 8 

 p.c, are quite reliable ; but No. 14, Fagus, with 8 p.c, is 

 questionable. Altogether, only nine of the fifty-eight 

 attained 8 p.c. or upwards. 



d. Distribution of Girth-increase over the Growing Season 

 in the Younger Group of Deciduous Trees. 



There is a great variety in the period of time in which 

 the trees got over the main part of their growth. Both the 

 Limes and one of the Ashes, for example, accomplished more 

 than half their increase in the month of June alone. 

 Table VII. gives examples of these varieties in distribution. 



Other examples nearly as well marked might be deduced 

 from Table VII. The similarity of results in both 

 specimens of Tilia, Betula, Ulmus, and Fagus indicate that 

 the results are characteristic not only of individual trees but 

 also of species. Cratcegus, Cgtisus, and Scdi,>', being single 

 of their species, yield results not so conclusive as the 

 others, but there is no reason to suppose that their growtli 

 is abnormal. 



TKANS. BOX. SC)C. EDIX. VOf,. XIX. 2 B 



