EEPOET ON TARIOUS MANURES AT CHISWICK. 
47 
inches long ; fibrils horizontal, very numerous, short, and densely- 
matted. 
Box 2. Fibres 12-14 inches long, denser than in 1. 
Box 3. Fibres 14 inches long. 
Box 4. Fibres 10 inches long, less branched than in 3. 
Box 5. Fibres 8-9 inches long. 
Box 6. Fibres 7 inches long, the least developed of any. 
Probably by accident. 
The actual state of the roots calls for little remark ; compara- 
tively the dilferences may be thus expressed : — 
1 
2 
3 
4 
5 
d 
e 
/ 
c 
h 
Plant 
a 
e 
/ 
c 
V. Po« trivialis^. 
Box 1. Plant tufted, sending off runners or offshoots. Eoot 
of very numerous very fine fibres, 6-7 inches long ; fibrils 
numerous, fiexuous, densely matted, and provided with scanty 
root-hairs. 
Box 2. Hoot-fibres 8 inches long, denser than in 1. 
Box 3. Fibres 4-5 inches long, superior to 1, inferior to 2, 
but denser than in 1. 
Box 4. More "stocky" than in 1, 2, and 3. Boot-fibres 4 
inches long, inferior to 3. 
Box 5. More " stocky " than 4. Boots about 6 inches long. 
Box 6. Moderately " stocky". Boots about 6 inches long. 
The most remarkable points that were brought into view by a 
comparison of the root-development with that of the herbage, &c., 
were aff'ordedin the case of the plants in box 2 (miu. man.), where 
the roots in April were comparatively highly developed, while 
the plant in October was comparatively little developed. This 
exactly corresponds to the phenomena in Dactylis and Bromiis. 
In box 5 (min. and ammonia) the reverse condition was ob- 
served, comparatively low development of the root and high de- 
velopment of the plant. In the other boxes comparatively little 
difference was observable. 
The differences between root and stem may be thus made 
apparent : — 
* The otserYations on this plant are not fully to be relied on. 
