Growth and Cell Division in Root of Vicia Faba. 151 
some experiments, records were taken continuously both 
during day and night. 
The following diagrams (Reference Plates I-III, pp. 180- 
182) are tracings of the growth of the roots reproduced, from 
the glass record plates, and the accompanying tables show the 
environmental conditions of temperature and moisture, which 
existed at the hours when readings were taken. The rate of 
growth per hour during day and night is also given. 
TABLE I (PLATE I). 
= H FI 5 
S S Rate of growth S 2 Rate of growth 
be = per hour. op = : per hour. 
= 3 rs) & 3 cS) 
3 Sree = Ss | 3 
o| o = B o| ¢ a ‘a 
Sih Beh eeeolde | tH ‘ve, ls 
a n= = = Day. Night. 42) a a = Day. Night. 
| 
Te PAN My oe 3) | AoM. | OF: 
10 84 100 9.10 | 76 100 
10.20 | 86 98 10.10 | 84 100 
} 11 86 96 10.40! 86 96 
! 11.30} 87 92 11.10 )°86 | 92 
11.50} 88 88 11.30 | 87 88 
P. M 11.50 | 88 82 
12.10} 89 76 P.M. 
12.40; 89 69 12.10 | 89 76 
1 89.5 66 12.40 | 89 69 
1.30} 90 63 1 89.5 66 
DAG 290 60 1.30} 90 63 
2.30 | 88 59 2 90 60 
3 86 59 2.30} 88 59 
3.30 | 86 63 3 86 59 
4 | 86 66 | 3.30] 86 63 
A.M. | | 4 86 66 
9 | 86 96 | A. M. 
21mm. | 3} mm. | 9 86 96 | 2mm. | 13mm 
! 
2/a.M 4 /)A.M. 
9 76 100 9.15 |. 76 100 
10.10 | 84 100 10.40 | 86 96 
| 10.40 | 8&6 96 11.10} 86 92 
11.10 | 86 92 11.30 | 87 88 
11.30 | 87 88 11.50} 88 82 
11.50 | 88 82 P.M. 
P.M 12.10] 89 ZA 
12.10 | 89 7 12.40} 89 69 
| 12.40 | 89 69 eek | 89.5 66 
1 | 89.5 66 1.30} 90 63 
1.30} 90 | 63 2 | 90 60 
2 90 60 | 2.80] 88 59 
2.30} 88 59 3 86 59 
3 86 59 3.30/ 86 | 63 
4 | 86 66 | 4 86 | 66 
A.M | | A.M 
9 86 96 9 86 96 } 
| 134mm. | 3} mm. 2mm. |1%,mm. 
| | | 
