244 
Groom.—Remarks on the Oecology of Coniferae. 
TABLE I. 
I. 
II. 
Aggregate 
leaf sur¬ 
face of the 
tree in 
sq. cm. 
III. IV. 
Absolute a? 7 iount 
of water tran¬ 
spired June 1 to 
Dec. 1, 1878, 
in grammes. 
V. VI. 
Number of 
grammes of water 
transpiredJune 1 
to Sept. 1, 1878, 
per sq. cm. 
vir. viii. 
Min im um num¬ 
ber of grammes 
of water tran¬ 
spired in one of 
the months f une 
to Aug. 31 per 
sq. cm. 
Sun. 
Shade. 
Sun. 
Shade. 
Sun. 
Shade. 
i Quercus Cerris 
Shade 
1,764 
2,065 
0.83 
0-113 
*4 ,, ,, 
Sun 
3,316 
1,975 
0.49 
0040 
18 „ 
)) 
3 , 35 6 
2,352 
0.58 
0035 
3 Carpinus Betulus 
Shade 
842 
5°4 
0-42 
0-113 
21 >, ,, 
,, 
1,829 
i ,337 
o -45 
55 ,, ,» 
Sun 
1,624 
3,848 
i *9 
59 ,, ,, 
77 
I3385 
2,568 
i -43 
o -43 
28 Fagus sylvaticci 
Shade 
1,776 
1,721 
065 
0.156 
29 ,, ,» 
>> 
728 
1,160 
1.1 
53 ,, ,, 
33 
7<>5 
971 
0-87 
6 2 ,, ,, 
>> 
365 
5 io 
0-9 
3 ° >, ,» 
Sun 
1,803 
2,461 
1-02 
54 ,, >> 
798 
1,986 
2.2 
65 ,5 y> 
. 33 
1,033 
858 
o -75 
0-156 
70 Betula alba 
Shade 
707 
1,868 
1.92 
0.558 
7 1 „ „ 
462 
1,740 
2-66 
5 ° ,, ,, 
Sun 
987 
2,523 
2.2 
5 1 „ 
33 
1,418 
4,154 
i -55 
o *545 
16 Fraxinus excelsior 
Shade 
1,503 
1,918 
o -75 
0*183 
J 7 ,, >» 
n 
1,940 
2,987 
I*l4 
15 ,, 5 , 
Sun 
3,067 
4,857 
i *45 
o *34 
56 ,, », 
3 > 
1,385 
4,270 
2-5 
13 Acer Pseudoplatanus Sun 
2,858 
‘,657 
0.51 
0-107 
56 » 
77 
1,085 
2,721 
2.1 
o -45 
9 platanoides 
Shade 
2,677 
1,636 
o *39 
0-096 
10 », ,, 
77 
1,466 
1,368 
o -599 
8 3 , 33 
Sun 
3,412 
3,524 
0.87 
11 ,3 
77 . 
4,435 
2,698 
0-46 
013 
24 Tilia grandifolia 
Shade 
1,015 
i ,474 
1.05 
o *3 
2 5 ,3 ,, 
Sun 
1,138 
3,094 
2-3 
0-627 
36 Pice a excelsa 
Sun 
} (i 4 ,256){ 
2,315 
37 33 3) 
77 
2,362 
0-13 (mean 
39 Pinus sy Ives Iris 
Sun 
( 5 , 323 ) 
1,074 
0*17 
4 7 Abies pec tin at a 
Shade 
1,986 
49 3 , 
7 5 
2,022 
6 9 „ 
Sun 
(12,394) 
2,840 
018 
Thus Von Hohnel’s method of calculation causes the transpiration 
of evergreen Conifers to seem disproportionately slow, because each leaf has 
relatively great weight and small surface. Yet when judged by trans- 
