[Vor. 5 
158 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
with special tables. In order readily to distinguish the quan- 
tities in the after-standardization intervals, that is, in the in- 
tervals after the application of the spray, the letters are 
written K’, B’, BL’, ete. 
The Bordeaux mixture was prepared as indicated in an 
earlier report, essentially the standard 4-6-50 formula of 
pathologists, while the mixture referred to as copper Bor- 
deaux is the 6-4-50 formula, and that called lime Bordeaux 
is the standard Bordeaux diluted with an equal quantity of 
lime wash. 
ABLE I 
Series A.—Potted potatoes) 
EFFECT OF BORDEAUX MIXTURE ON THE RATE OF TRANSPIRATION. 
DATA IN GRAMS 
m 2Kt зв ак | sB | 6K | 7B | 8K 
8:20 A.M.-11:25 A.M. 1/9/17 E 20 | 13 | 11 | 13 | 22 | 15 | 8 
K:B = 61:60 = 1:.98 с Sunshine | | i | | 
11:25 А.М.—3:25 Р.М. 1/9/17 | 27 30 23 | 15 | 19 | 33 | 22 | 15 
K:B = 93:91 = 1:. - Sunshine | | | | | 
e SSP Mie Pa 1/9/17 E 41616 3 |Т E 
K:B = 22:22 = 1:1 . Sunshine during early P.M. hours | 
и 8:28 P.M.-9:57 A.M. 1/10/17 | 16 | 13 | 17 | 10 16 | 18 | 11 
K:B = 50:58 = 1:1.16 = Cloudy during early A.M. hours _ 
m 2K'| 3B' | 4K’| 5B’| 6K’ 7B | 8K’ 
4:00 P.M.-8:36 A.M. 1/11/17 | 49 | 11 | 38 | 15 | 24 | 17 | 52 | 17 
КВ" = 60:163 = 1:2.7 = Sunshine а 
8:36 А.М.-12:31 P.M. TIUD [5 ed Ka Kl Ke Kd Kad 
КВ” = 107:110 = 1:1.0 Sunshin 
UN 12:31 P.M.-2:33 P.M. IUT | 21 | 28 1 17 | 14 | 15 | 24 | 21 | 14 
K’:B’ = 80:74 = 1:.93 = Sunshine | | i | | 
* В = Bordeaux mixture. ТК = control. 
If, in table т, the total water loss of the intervals before 
spraying is compared with the total after spraying, the ratio 
changes from 1.02 to 1.4, a percentage increase of 37 per cent 
to be attributed to the Bordeaux film. However, in view of 
the possible effects of environmental conditions, it is of in- 
