IIEPORT OK VARIOUS MANURES AT ClIISWICK. 
49 
root a foot long, reaching to the drainage, and not further. 
Sfcouter than in no. 1. 
In this box two roots are specially worthy of notice from their 
relatively enormous proportions ; one was nearly 20 inches long, 
nearly | inch in diameter at the upper portion, and almost destitute 
of fibres, except at the upper end. At the extremity it divided into 
a leash of stout fibres, which must have gone between the spaces 
at the bottom of the box into the subjacent soil. The other root 
had evidently originally been of similar character and dimen- 
sions ; but by some accident it had been broken ofi* in the middle. 
The consequence was the form-ation of a vast number of fibres, 
averaging 8-9 inches in length. 
Box 3. Tap-root a foot long, somewhat exceeding the normal 
roots of 2 ; fibres more numerous and longer, 2 inches long. 
Box 4. On the whole less developed than 3. In one case there 
was a slender tap-root 16-18 inches in length. 
. Box 5. Boots less developed than in 4 or 3, 10-12 inches long. 
Box 6. Boots about a foot long, more developed than in 5, but 
on the whole inferior to 2 and 3. One root very large. 
The comparison of the root in April with the plant in October 
brings out some curious antagonisms thus in 3 (ammonia-salts) : 
the root attained a maximum degree of vigour, while the plant 
was lower in the scale; in box 5 (ammonia and mineral) pre- 
cisely the reverse took place — root low, plant highly developed. 
The conditions in 5 were repeated, but less markedly, in 6. 
The comparison is shown in the following formula : — 
1 
2 
3 
4 
5 
6 
a 
e 
/ 
G 
h 
d 
Plant 
a 
e 
5 
6 
d 
f 
viii. Lotus corniculatus. 
Box 1. Plant tufted. Boot tap-shaped, fleshy, 16-18 inches 
long, J inch in diameter at the upper part, slightly branched ; 
main branches slender, horizontal, 2 inches long, with numerous 
nodules, the lower ones descending, and without nodules. 
Box 2. Boots 16 inches long ; fibrils, especially the upper ones, 
much more numerous, and ascending, 2-3 inches long. 
Box 3. Boot 18 inches long, thicker and more succulent than 
in box 2, more fibrous ; fibres much longer (5-6 inches), and more 
generally distributed, upper ones horizontal or ascending. - 
