SECOND BEPOET ON VAEIOUS MANURES AT CHISWICK. 139 
and ammonia) the root-development was lowest of all, while in 
the sixth (mmeral and nitrate) it was medium. 
The discrepancy between the development of the plant on 
April 22, 1871, and that of the root on the same day is well shown 
in the Table. 
A general comparison of results with those recorded in the pre- 
ceding year, shows a sufficiently close approximation. Thus the 
plants in boxes 1, 2, and 3 were nearly the same in point of vigour 
in both seasons. This was even more markedly the case in box 4. 
Box 5 presented much the same characteristics as previously ; but 
the plants in box 6 presented this year a somewhat lower 
average. 
The root-development was so different from what it was last year 
that it does not admit of useful comparison. In box 6, however, the 
root was noted as having attained the same relative degree of vigour 
in both years. 
Trifolium pratense. 
Boxes , 
1. 
2. 
3. 
4. 
5. 
6. 
1870. 
April 25 
a 
d 
/ 
e 
May 2 
"h 
a 
c 
d 
/ 
e 
„ 9 
h 
a 
G 
d 
/ 
e 
16 
h 
a 
C 
d 
/ 
e 
„ 23 
h 
a 
C 
f 
„ 30 
c 
h 
a 
"d 
e 
f 
h 
a 
c 
e 
d 
f 
„ 13 
a 
f 
d 
e 
„ 20 
b 
a 
c 
e 
d 
f 
„ 27 
a 
f 
d 
e 
a 
d 
e 
f 
„ 11 
c 
d 
e 
f 
Cut on July 15. 
August 22 
d 
c 
e 
f 
a 
h 
September 5 ... 
e 
d 
f 
a 
1871. 
April 22 
f 
h 
c 
a 
a 
e 
„ „ Roots... 
1 
f 
a 
h 
d 
c 
e 
