86 
Adams .— The Effect on Certain Plants of 
Sunflower No. i in Open Ground , i()2i. 
The seeds were sown on 23 May, and on 2 June twelve plants were left 
in each plot, which number remained to the end of the experiment. The 
time of darkening extended from 2 June to 21 June and comprised seventy 
hours. In the exposed plot five plants were in flower on 23 August and ten 
on 31 August. The first flower in the covered plot opened on the latter 
date. On 6 September the stems were cut off at the ground level, the roots 
being left in the ground. 
The results 
were : 
Average 
height of 
stem. 
Tallest 
plant. 
Average 
weight of 
plant. 
Heaviest 
plant. 
A T o. op 
plants in 
flower. 
cm. 
cm. 
grm. 
grm. 
Exposed plot 2 57*39 
294-64 
1808-460 
2863.290 
12 
Darkened plot 1 97* 2 7 
251.46 
444- i 4 
1417.470 
5 
Sunflower No. 2 in Open Ground , 792 /. 
The seeds were sown on 23 May, and on 2 June fourteen plants were 
left in each plot, the number being afterwards reduced to twelve. The 
period of darkening was exactly the same as in the case of Wheat. In the 
exposed plot the first plant came into flower on 25 August, and on 
2 September four were in flower. The first flower in the darkened plot 
opened on the latter date. The stems were cut at the ground level on 
7 September. The results were: 
Average 
height of 
stem. 
Tallest 
plant. 
Average 
weight of 
plant. 
Heaviest 
plant. 
No. of 
plants in 
flozver. 
cm. 
cm. 
grm. 
grm. 
Exposed plot 
Darkened plot 
273-05 
237-49 
294-64 
274.32 
1434-000 
682.750 
5 I 45 - 4 I ° 
1233.200 
12 
5 
Experiments with Indian 
Corn and 
Wax Bean in 
Open Ground , 7927 
In this series there were twelve rows, six being Indian Corn and six 
Wax Bean. Each pair of rows was of approximately equal length, and one 
row of each pair was darkened, while the other was exposed to daylight. 
The seeds in all the rows were sown on 17 June and the period ol darkening 
extended from 27 June to 13 July, the sunny days during the time of 
darkening being slightly in excess of the cloudy days. One row of Indian 
Corn was darkened on the average for two hours daily, another for three 
and a half hours daily, and the third for five hours daily, the procedure in 
the case of the rows of Wax Bean being similar. The average length of 
daylight between 27 June and 13 July was about fifteen and a half hours, 
reckoned from sunrise to sunset. 
