[Vor. 5 
168 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
be manifested in all of the sprayed plants, leading imme- 
diately to a falling off in the rate. The edges of the lower 
leaves dried out rapidly and it was necessary to discontinue 
the series. 
It seemed desirable to employ in one series some broad- 
leaved, fairly succulent plant, and at the same time to make 
several observations during the evening or night interval in 
order to control more completely the previous experiments, 
as a result of which the night intervals of sprayed plants had 
almost invariably shown the highest transpiration ratios. 
The results of series G are particularly interesting. It is felt, 
however, that the variability exhibited by the different groups 
of plants during, say, the first four to six intervals, indicates 
a lack of adjustment to the new conditions; and perhaps it 
would be best to regard the last five intervals of the stan- 
dardization period (VII-XI) as expressing more nearly the 
true ratio of the two groups of plants. 
The plants were sprayed moderately, and, as will be noted, 
three observations were made between 4:30 and 10:30 P. M. 
From the results noted in intervals XII-XIV there was, after 
TABLE VIII 
(Series H.—Potted Cyperus) 
EFFECT OF BORDEAUX MIXTURE ON THE RATE OF TRANSPIRATION. 
DATA IN GRAMS 
Гав Гак [зв |x | se] ox | в | ox 
10:00 A.M.-11:00 A.M. 10/25/17 | 18 | 18 = 15 | 21 | 12 | 18 | T 
K:B = 56:57 = 1:1 Cloudy — erie? | 
" 11:00 A.M. РИКИ. 10/25/17 Е 16 [----| 12 | 18 | 9 E | 2 
K:B = 39:43 = 1:1.10 Cloudy - | | | | 
" 12:04 A.M.-1:00 P.M. 10/25/17 | 16 | 19 [----| 15 | 18 | 12 | 19 | 10 
КВ = 56:53 = 1:95 Cloudy - | | | | 
m 1:00 Р.М.-2:09 Р.М. 10/25/17 | 12 | 13 [----| 13 | 17 | 17 | 5 | 1 
КВ = 44:34 = 1:77 "Cloudy 0 pu 
И 2:09 Р.М.-3:08 Р.М. 10/25/17 E 11 ----| пр) 6 | 13 | 8 
K:B = 36:41 = 1:1.14 © Cloudy | iR | | 
e 4:01 P.M.—7:15 А.М. 10/26/17 | 44 | 52 |----] 32 | 61 | 50 | 28 | 24 
(КВ = 158:133 = 1:.84 Cloudy eee 
