100 BOTANICAL GAZETTE [FEBRUARY 
relation is perhaps due to the fact that these solutions proved injurious 
to growth as indicated by transpiration and green weight. When one 
examines the figures showing the units of water transpired per unit 
of green weight, he finds that the presence of inorganic acids in the 
TABLE III 
UNITS OF WATER TRANSPIRED PER UNIT OF GREEN WEIGHT IN WHEAT 
CULTURES CONTAINING VARIOUS AMOUNTS OF INORGANIC ACID 
: a0 per 
No. Solution fags oony oe = nt green 
I Control in H,O 53.0 ve pp 
‘ ay 5e06 26.0 .go 28.8 
: : 3o08 5 1.08 25.4 
: 3 ee 32-5 1.50 21.7 
; < 20000 52.0 ea 29.1 
. : a 57-2 £73 33-0 
es 5556 35-5 I.40 25.3 
: on 46.5 ¥.6r 25.1 
: 10000 61.5 1.84 33-4 
= "36006 59-5 1.95 34.0 
es : yes 47-5 1.67 28.4 
2 | HISO 5506 16-5 1.24 12.5 
ies : <o08 32-9 I.19 26.9 
a I : TaBoS 49-5 1.60 30.9 
: : Sone 45.0 1.46 30.8 
16 ie ones 30.0 1.38 21.7 
concentrations there used did not cause an increase in the amount 
transpired per unit green growth, but caused instead a greater OF 
less retardation in transpiration. In the experiments where organic 
acids were added the proportional transpiration, in most of the cases, 
was somewhat larger than that of control plants. Here then the 
results may be said to agree with those of the authors previously 
mentioned. But the results given in table III show quite general 
disagreement. 
