GEN^ERAL REPORT. 
li 
Plant Evaporation. 
I. Artemisia Tridentata. yulyix^iZ 
Portion of plant. 
Young leaves 6.62 
Stems '! 2.21 
I 
Older leaves ii 20.24 
Stems I 5.44 
Stems and leaves . . 50 . 84 
Flowering stems. . 19.33 
When ex- 
posed. 
!.45 P- m- 
2.45 P- m. 
[ . 15 p. m. 
1. 15 p. m. 
1.30 p. m. 
1.4s p. m. 
h. III. 
4 50 
4 50 
4 35 
4 35 
4 V 
55 i^ 5 
44 24 00 ! 12 
35 ■ 24 00 18 
23 1 24 00 IS 
Thermometer. 
Hour. 
1 00 p. m. 
2 GO p. m. 
3 00 p. m. 
4 00 p. m. 
■• .V, ]>. ni. 
p. III. 
°F. 
81.6 
81.2 
79-5 
79'5 
77-4 
7,i-3 
Q 
°F. 
21.3 
22.5 
22 . 5 
23.1 
22 . 2 
19.7 
Notes. 
136.0 
150.2 
140.0 
162.0 
2. Tetrad VMIA 
26 
29 
y 
J 5 :l . 
in. 
3 45 
13 
81 
3 
45 P- 
m. 
3 IS 
IS 
46 
3 
45 P- 
m. 
3 IS 
13 
18 
3 
55 P- 
ni. 
3 5 
: 16 
19 
3 
55 P- 
m. 
3 5 
5 45 
9 
00 
a. 
m. 
74- J 
14.0 
154 -8 
10 
00 
a. 
m. 
80.1 
20.8 
156.2 
Older plant. 
12 
00 
m 
83.7 
26.9 
155.0 
4 
00 
P- 
m. 
So. 9 
25-5 
iSS-o 
More pubescent 
riety . 
00 
P- 
m. 
75-3 
13-9 
3, 4. LiNOSVKIS VISCIDIFLORA AND GRAVEOLENS. July 23. 1868.* 
Branch ' 16.48 
Branch 
9.24 
8.50 
a. 
m. 
I 10 
9 
8-55 
a. 
m. 
I 5 
10.00 
a. 
m. 
I 15 
26 ! 
10.45 
a. 
m. 
0 5 
3 
0 22 4 
1 48 ' 29 
^ L. visciditiora. 
L. graveolens. 
In shade. 
In sun . 
5. Prunus demissa. Same day. 
Branch 
Branch 
Leaves 
19-73 
5.12 
34-77 
4. 10 p. II, 
4-15 P- m- 
4.20 p. m. 
6. Obio.ne confertifolia. Se/>t. 27 and Oct. 5, 1868. 
41 
71 
12 
00 
m. 
2 
00 
22 
9 
22 
12 
00 
m. 
2 
00 
5 
Leaves and fruit. . . 
j 70 
22 
9 
30 
a. m. 
5 
00 
28 
14 
81 
9 
30 
a. m. 
5 
00 
II 
12 00 m. 
I 00 p. m. 
9 30 a. m. 
I 30 p. m. 
78.7 
21 .2 
80.4 
23.6 
67.7 
II. 7 
75.0 
15.5 
The thermometrical record for this date is given in full in the table on page xxii 
It must be confessed that these experiments were conducted witli too 
Httle method and are too incomplete to be fully satisfactory. The amount 
of loss as here shown is doubtless greater than it would have been froui the 
same leaves and stems when attached to the plant, yet making a probaldy 
full allowance for this source of error it appears that the ordinary drain upon 
the juices of these plants must be large. Comparing the recorded amounts 
of water evaporated from an open vessel during the same hours with that 
