Division in the Root of the Vicia Faba. 159 
TABLE VIL. 
fail fle. | 
Shel 2 Rate ofgrowth | 2 | £ Rate of growth 
Ke | 5 . per hour. Hs | 2: : per hour. 
2 eee te ~3| | 8 
Palca |e | = cH go | #12 
oe te, tS rs lis |] 8] s]8 ; 
Zz a | & = Day. Night. (4 = = = Day. Night. 
Pot ase SR: | ! 4 }/a.m.| OF. ! 
cen tee | i| 9 | 838 | 
| 10 | 91 | | | a | 95 
eel 9 | P. M. | 
P.M. | 12 | 98 
| 12 | 98 1 | 99 
ete 99 8 | 9 
| ate 96 #51, 93 
| 4 | 93 | peed 
| A. M. j 9 86 
| 9 | 8 | 7mm. | ymm. 
| 1} mm. & mm. | 
j | 1} | 
2 | a.M. |} | 1 5 | AM. | 
3 8 | 9 88 
| 10 | 91 | 10° | 91 
; il 9 | 11 95 
| P. M. P. M. 
| 12 | 98 | 12 | 98 
| a 1 | 
2 6 | 2 96 
| 4 | 93 | 4 | 
| A. M. A. M. 
9 86 | 9 86 
| 323mm. | mm. Imm. | 7mm. 
| farsa | 
3 | A.M. | 6 jam. | 
Fe ain. ah ees 9°| 88 
| 10 | SL li | 9% 
| 11 | 95 | \P. M. | 
FM 12 | 98 
12 | 98 1 99 
1 99 3 | 9 
2 96 | A. M. 
a 93 9 86 
A. M. 
| 9 86 | | 
| 1# mm. | mm. || | §mm. | 3mm. 
The conclusion to be drawn from the accompanying figures 
is very evident; z. e., that without exception the growth of 
the roots is greater during day than during night. 
In all the 
diagrams there is seen a change in position of the root, indi- 
This is due in all probability to the 
circumnutation of the roots, and in calculating the rate of 
growth, all such changes have been taken into consideration. 
Many more experiments were performed than are here 
cated by the dotted line. 
