368 The Botanical Gazette. [June, 
Leaf IV.—Day. 
DatTE. Lencrs Day Day Sede WInp. 
OF Lear, | GrowTH. | TeEmp. Cisiierd, 
Feb. 26 7.75 2.25 78 0.0 E.-N. E. 
27 10.0 1.5 78 2.25 Sit W. 
28 12.5 1.75 80 a5 E.-N. E 
29 15.25 1.75 80 2.75 Ss: W. 
mary 18.5 2.0 81 3-75 S. 
2 22.0 2.75 77 3-5 Ss. 
3 26.0 2.75 72 4.0 E.-W 
4 33-75 5.75 78 7.75 | W.-S. W 
5 2.0 5.5 80 8.25 w.-S. W 
6 47.75 3-5 77 5.75 
7 50.0 1.8 76 2.25 N.E 
8 52.5 2.0 77 2:5 N. E. 
9 53-25 8 76 75 N. E 
Before speaking in detail of the data presented by the four 
tables giving the history of each leaf, for convenience, we 
shall bring these data together in a table of averages, in which 
are given the length, breadth, and surface development of the 
leaves, with the more detailed data. The ‘‘length of leaf 
given is the total length of the mature leaf, less its length at 
the time of the first measurement. This correction is neces- 
Sary, or the total ‘‘surface of the mature leaf,” and the ‘‘daily 
surface growth” would be given too high. 
The averages are as follows: 
ae 
: “< : : 
i | fy Es 5. i 3] < 
: a 4 a Ge = 9 Bg . 
| be Eo Be So 1 tae bp ee 
& ) me Z #3 = na = Pre] = 
* re) on o 8 O Py <0 <0 as 
~ a 6 Gk rca cEsl A ABR a oH 
é = a On a <0 | 22 
° v < < Zz zo Zz z < 
. Z by <x <2 = <o a0 
C} Fe FI a EI az = aD s 
Z ra a) . = s b= 1) 
No. I. 29.5 14 413 4.25 59.0 72.5 
II.| 35.5 | 14 | 497 - 4.5 62.0 |. 72-0 
| Se | ee go 4 ie t eas 1 ee ee 
Wi 5 1 1p) Gop 1 ae | ss 1: 5.8 | Oe 
pena, See ee Bae 
