66 CHRISTISON—ADDITIONAL OBSERVATIONS ON 
The facts are given in the Table in the following order :--- 
1, The average rate of increase before pruning. 
2. The average rate for the whole period after it. 
3. The highest record in any one year. 
4. The lowest record in any one year. 
5. The average rate for the last two or three years. 
6. The lapse of years between the pruning and the final results. 
Tas_e B.—ErFrects or PRUNING ON THE RaTE OF GIRTH-INCREASE, 
IN THE ORDER OF THE Least EFFECT. 
RATES. 
= wing | mas | Ser | ae Tart 
14 | Robinia Pseudacacia, 223 23} 294 20} 23} 11 
16 | Quercus Ilex, 16 12} 214 9 20 1B 
15 3h? Genes 17 11} ali 123 18 11 
85 | Tilia europeea, geen: 11} 16} yy 163* 3 
1) | Crateegus Oxyacantha, .. 254 154 26 5 253 Il 
9 | Populus fastigiata, 31 203 26} 15} 263 7 
551 Q ferta, 43 17 28 4 aT il 
16 | Acer Pseudoplatanus, .. 31 103 274 iy 19 ll 
20 | Fagus sylvatica, .. 36 19 254 123 193 10 
17 | Betula alba, 41 173 293 6} 19} il 
10 | Quereus pedunculata, .. 173 1 10} 5 9 ul 
1 | Cytisus Laburnum, 165 104 27 6} ee il 
6 | Ulmus campestris, 15} (0 10 = 5 6 3 
2 | Fraxinus excelsior, 303 163 20} 1143 11 11 
8 | Pyrus communis,.. 203 3} 10 ) 1k ll 
5 | Prunus Padus, 503 224 28 15 16 ll 
21 | Ulmus montana, .. 35 5 144 44 114 il 
3 | Tilia europea, 31 14 23 64 9 il 
40 | Quercus conferta, 39 12 204 2h 1 ll 
12 | Acer campestre, 32} 15} 253 yy 11h lL 
64 | Quercus conferta, a7 124 203 0 7 9 
7| Alnus glutinosa, .. 19} 6 10 2h 3 ll 
4| Esculus Gupiiaiens 31 8 19 0 2 i 
*Last year only. 
