88 
Adams. — The Effect on Certain Plants of 
Wax Bean No. 2. 
There were ten plants in each row. The period of darkening was the 
same as in Indian Corn No. 2, and averaged three and a half hours daily. 
On 20 July on the exposed plot five plants were in flower, while on the 
darkened plot four were in flower on the same date. 
The plants were pulled up on 23 July with these results : 
Exposed plot 
Darkened plot 
Average height 
Tallest 
Total 
of stem. 
plant. 
weight. 
mm. 
mm. 
grm. 
366.9 
434 
219.710 
335*6 
422 
170-100 
Wax Bean No. 3. 
There were sixteen plants in each row, which were afterwards reduced 
to fourteen. The period of darkening was the same as in the case of Indian 
Corn No. 3, namely, five hours daily on the average. 
On the exposed plot on 20 July eight plants were in flower, while on 
the darkened plot there were none. The first flower on the darkened 
plot opened on 22 July, on which date eleven were in flower on the 
exposed plot. 
The plants were pulled up on 25 July with the following results : 
Average height 
Tallest 
Total 
of stem. 
plant. 
weight. 
mm. 
mm. 
grm. 
Exposed plot 
53 i-o 
815 
411.080 
Darkened plot 
317-5 
425 
219.710 
Experiments with Tomato in Greenhouse , 792/. 
There were twelve pots with one plant in each. Four of these were 
left uncovered, and the remainder were darkened in sets of four each, the 
period of darkening being the same in each four. Wooden boxes were 
used as covers. The seeds were planted on 23 May. The period of 
darkening extended from 6 June to 30 June and comprised altogether 
ninety-two and a half hours, or an average of three hours forty-two minutes 
per day. This made the daily periods of light and darkness approximately 
equal. The actual time of covering on any one day varied from two to six 
hours. The different pots received approximately the same amount of 
water. 
In the exposed pots the first plant came into flower on 4 July, and 
on 7 July all four were in flower. 
In the first series of darkened pots the first two plants came into flower 
together on 11 July, while in the second series of darkened pots the first 
plant came into flower on 9 July. 
