50 
EOYAL nOETICULTXJRAL SOCIETY. 
Box 4, Boot 16 inches long, fleshy; fibres numerous, upper 
ones ascending, lower obliquely descending ; knobs numerous and 
large. 
Box 5. Inferior to 3 and 4, though longer, 18 inches long ; 
upper fibres ascending, lower descending; knobs not so nu- 
merous or so large as in 4. 
Box 6. Superior to 5, inferior to 4. Eoot 14 inches long; 
upper fibres thick, ascending ; root-knobs large. 
Considerable differences were observable between the condition 
of the roots in April and that of the plants in the preceding Oc- 
tober. Thus, in the unmanuredbox 1, while the root was at a mi- 
nimum (a), the plant was noted as having attained the maximum 
of development (/). In box 2, root and plant alike were poorly 
developed. In box 3 the root was not so fully developed as the 
plant ; in box 4 (nitrate of soda) considerable difference existed, 
as the root had attained the maximum degree of development, 
while the plant had attained only a moderate degree. In 5 (min. 
and ammonia) the root was not so vigorous as the plant, while, on 
the other hand, in 6 the root was very much better than the 
plant, the latter being noted at a minimum. 
In a few instances the root had made its w^ay through the 
bottom of the box into the soil beneath. It was curious to ob- 
serve that, when this took place, the tap-root broke up into a 
number of branches, and these again into leashes of smaller 
fibres. 
The condition of the plant and that of root are shown in the 
following Table : — 
1 
2 
3 
4 
5 
6 
Boot 
a 
h 
c 
/ 
d 
e 
Plant 
f 
b 
d 
c 
e 
a 
ix. Trifolium repens. 
Box 1. Plant caespitose, giving off numerous runners. Tap- 
root 12-13 inches long, very gradually tapering, but little branched; 
branches descending obliquely, and with but few fibrils. 
Box 2. Tap-root 8-9 inches long. 
Box 3 showed considerable differences among the plants ; the 
measurements of two characteristic plants are given. In one 
the runners were 2 inches long, the tap-root 12-14 inches in 
length, the fibres 3-4 inches long. In a second specimen the 
