374 BOTANICAL GAZETTE [MAY 
TABLE I 
aS = z= ern NES Mee PS ABER ee 9 2 
No. Time Hours Air per hour | mg. CO:per hour Weather 
I | 10:30 A.M.- 5:30 P.M. 7.00 6.86 4.47 A-B 
g 5:30 P.M.— 8:30 A.M. 15.00 6.14 3-45 A 
3 8:30 A.M.— 5:30 P.M. Q.00 5-78 3 2t Cc 
4 5:30 P.M.- 8:30 A.M. 15.00 ST 2.57 O 
5 8:30 A.M.- 5:00P 8.50 5-65 242 O 
6 5:00 P.M.-I0:00 A.M 17.00 5-76 2.13 c 
7 | 10:00 A.M.- 3:15 P.M Gras 582 2.20 O 
8 3:15 P.M—I10:15 AM Ig.00 5-42 1.98 oO 
9 | 10:15 AM.— 6:15 P.M 8.00 Git? 1.89 & 
Io | 6:15 P.M.- 9:00 A.M 14.75 4.05 1.76 O 
II | Q:00A.M.- 4:45 P.M 7:98 4.91 2.11 O 
12 | 4:45 P.M- 8:30AM 15 4-95 1.96 O 
13 | 8:30A.M.- 5:00P.M 8.50 4.82 1.81 O 
14 | 5:00 P.M. 8:15AM T5225 4-79 1.67 R 
£5 8:15 A.M.- 5:15 P.M 9 4.89 1.61 [Osea 
16 15 P.M.— 8:45 A.M 18 .2¢ 4.65 1.58 A 
17 8:45 A.M.— 5:30 P.M 8. 4.46 1.56 A 
18 | 5:30P.M.- 8:45AM 45.25 4.39 £90 ei. 
19 8:45 A.M.— 5:30 P.M 8. 4.23 t.67 A 
20 | 5:30P.M.— 8:30A.M 15.00 4:93 1.63 A 
21 | 8:30A.M— 5:30P.M 9.00 6.22 1.56 A 
22 | 5:30 P.M.- 9:00A.M 15.50 6.71 1.45 B 
23 | 9:00A.M.- 6:00P 9.00 7.00 1.43 B 
24 | 6:00 P.M—I0:15 A.M. 16.25 6.89 156 A 
