THE GIRTH-INCREASE OF TREES. 
119 
In the last, or August-September period, nine species, or nearly 
one-half, attained a proportion of 25 p.c., or one-fourth of the 
seasonal growth, and in four it was under 15 p.c. 
proportion was 45 p.c. in Robznta, and the lowest 6 p.c, in 
Fraxinus excelsior. 
1891-95, ARRANGED IN THE ORDER OF AMOUNT. 
TABLE VIII. 
BI-MONTHLY P.C. OF GIRTH-INCREASE IN SINGLE TREES OF TWENTY SPECIES, 
The highest 
First Middle Last 
Months ont Months 
Quercus robur 28-2 | Acer Pseudop. -| 71:9} Robinia- — - 45-0 | 
Betula alba - - | 27-1 Tilia - - -| 71:8 | Salix - - - | 865 
Fraxinus excelsior - | 26-7 | Pyrus Aue, - - | 68°0 |] Fagus - At BFS 
Quercus Cerris 25°6 | Fraxinus 67°1 | GEsculus 26°7 
Prunus Padus 21-5 | Populus - 63°9 | Crategus 26°6 
Salix sp. 18-5 | Ulmus 62°5 | Quercus rubra 26°1 
Pyrus communis 17:2 | Cytisus - 62:2 | Alnus 25-6 
Alnus glutinosa 16-9 | Gsculus - 61:0 | Betula - 25°6 
Pyrus Aucuparia 16-0 | Crategus 60-9 | Populus - 25°0 
Acer campestris - | 15°2] Acercamp. - 60-8 | Acer camp. 24°0 
Cytisus Laburnum - | 15°1 ] Querens rob. - —- | 60°] | Pyrus com 23:1 
Robinia —- Pseud- | 14°8 | Pyrus com. 59-7] Ulmus - - -| 229 
Acie Peeudinplatenas 148] Pronus - - -| 584) Cytisus- - 22°7 
Ulmus campestris - | 14:6] Fagus - z - | 58:0 | Prunus - cp rs Be 
Quercus rubra = - | 144] Alaus -  - ~— - | 575 [ Quercus Cerris - | 183 
Fagus sylvatica - | 14.2 | Quercus rub. - 57-3 | Pyrus Auc. -| 16-0 
Tilia europcea -| 141 », Cerris -| S61) Tilia - =| 141 
Crategus Oxy-| 125] Betula - - -| 473] Acer Pseudop. -/| 133 
Gonies Hes 12:3 | Salix - _ | 45-0 | Quercus rob. - - | U7 
Populus fastigiats - | 11-1 | Robinia - .| 405 | Fraxinuns - -| 62 
