[Vor. 5 
160 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
TABLE II туеннан 
(Series B.—Potted potatoes) 
EFFECT OF BORDEAUX MIXTURE ON THE RATE OF TRANSPIRATION, 
A IN GRAMS 
| 1K’ | 2B’ ES | 4B' Be ШЕ 7B' ГЕ 
" 5:32 P.M.-7:10 A.M. 2/17/17 HEBBEUBDUE 
K’:B’:BL’ = 15:51:50 = 1:3.4:3.3 i | | 
M 7:10 A.M.-1:20 P.M. 217/17 ilis 40 | 53 [47 | 32 | 82 | 45 
K’:B’:BL’ = 151:137:77 = 1:97:51 Sunshine | | | | | 
2:08 Р.М.—7:57 Р.М. 2/17/17 | 24 | 20 | 17 | 22 | 21 | 16 | 15 | 18 
хуи IN | 
K':B':BL' = 72:57:34 = 1:.79:.47 Sunshine during early P. M. hou 
7:51 P.M.-8:26 A.M. 2/18/17 | 2 |19 9 | 0] 6 | 10 | 6 | 10 
XVIII жә. 
K':B':BL'z 17:30:20 = 1:1.76:1.18 
m" 8:26 А.М.-4:39 P.M. 2/18/17 29 | 27 | 19 | 23 | 13 | 14 | 15 | 18 - 
K'B':BL'- 61:66:32 = 1:1.08:.52 Cloudy | 
x 7:10 A.M.-3:2 Р.М. 2/19/17 |31 | 56 | 61 | 52 | 35 | 47 | 29 | 34 
K’:B’:BL’ = 127:137:81 = 1:1.08:.64 Sunshine 
standardization, each interval extending throughout the night 
or somewhat longer. We then find that the ratio has changed 
from 1.16 to 2.71, or an increase of 133 per cent as a result of 
the surface film. During the second interval after standard- 
ization, VI, a day interval, the transpiration loss under condi- 
tions of continuous sunshine is very little more than during a 
similar interval, II, before standardization. Interval III be- 
fore standardization is scarcely comparable with interval VII 
after standardization, but it is interesting to note that the 
increased water loss due to Bordeaux has now apparently dis- 
appeared, and the loss from these plants exhibits a ratio 
lower than in the control. Moreover, there is no interval 
after standardization which compares with the dull cloudy 
interval before standardization. 
In table п considerable individual variation is exhibited, so 
that the relation of the K, B, and BL plants is not as con- 
stant as might be desired in the intervals before standardiza- 
tion. There seems to be a tendency for the K and BL loss 
to show a fair constancy, whereas the B plants frequently 
show a relatively high ratio during the day intervals and a 
