“184 BOTANICAL GAZETTE [SEPTEMBER 
numbers placed upon the curves showing their relative magnitudes, 
which alone are of interest here. 
Series II.—This series is identical in treatment with Series I. It 
lasted 18 days, from November 11 to November 29, 1904. 
The plants are shown in jig. 3, and curves for the series are given 
in jig. 4. It will be noticed that in this case both weight of leaves 
and weight of tops are represented, the latter being denoted by Wi. 
Apparently the former increases somewhat more rapidly than the 
latter with increasing fertility of the soil. The curves of transpira- 
tion, leaf area, and the other two curves just mentioned lie 9 
Ses 
FIG. 5 
close together that according to any one of them the several baskets 
would fall into exactly the same series, which would again be iden- 
tical with that obtained by arranging them in accordance with the 
increasing amounts of manure used. Transpiration per unt area 
is fairly uniform throughout this series, but that per gram of green 
tops decreases slightly with increasing fertility. The series is on the 
whole in harmony with Series I. 
Series III.—This series is another duplicate of Series 1. The 
experiment lasted from November 23 to December 14, 19% s 
plants are shown in fig. 5, and fig. 6 represents the curves. If bas 
no. 2 were omitted from the series (and it is obvious that its a 
are very erratic, though wherein the error lies it is impossible : 
determine), the curves would take the general form as those of ae 
TandIl. Itis again seen that the order of arrangement of the et 
kets by amount of transpiration agrees with that obtained from t 
