30 
BOTAL HOETICrLTrEAL SOCIETY. 
Box 6. High degree of vigour throughout May ; slight check at 
the end of the month ; shrivelled with heat at the end of June. 
Towards the end of June the plants became so matted and suf- 
fered so much from drought, that comparative observations could 
not be made. In the earlier part of the time no relation to tem- 
perature and rainfall was observable in the plants in boxes 1 and 2. 
In 3 the plants showed a slight relation to diminished rainfall in 
the early part of June. In the plants in box 4 a slight relation to 
increased temperature in the middle of June was observable. In 
5 a slight relation to increased rainfall at the end of May was 
observed ; while in box 6 the plants showed no perceptible relation 
to temperature or rainfall. 
iv. JPoa pratensis {annua). , 
Box 1. Uniform throughout the experiment. On June 30 the 
plants were healthy, but feebly developed, with a few flowers. 
Height, on June 30, 7 inches. 
Box 2. Plants more vigorous than in 1, but uniform throughout 
the experiment. On June 30 a tendency to flower was noted. 
Average height 8 inches. 
Box 3. In this box the plants had generally broader leaves than 
in the rest, and exhibited the medium degree of vigour. A slight 
rise was seen at the end of May, which was maintained through- 
out June, at the end of which month a slight decline occurred. 
Average height at that time 9 inches. 
Box 4. Medium degree of vigour. Slight arrest at the end of 
May, which continued through June ; slight rise at the end of the 
month, when the average height of the plants was 9 inches. 
Box 5. High degree of vigour throughout the experiment, 
slight arrest towards the end. Average height 7 inclies on June 30. 
Box 6. Uniform maximum degree of vigour throughout, longer 
stems and leaves, but no flowers. Average height, June 30, 
10 inches. 
In 1 and 2 no relation to temperature or rainfall was observed ; 
in 3 a slight correspondence with increased rainfall and tempera- 
ture at the end of May and beginning of June was remarked ; in 4 
a slight decline, corresponding to that of the temperature and 
rainfall towards the end of May. In no. 5 no perceptible rela- 
tion to temperature or rainfall, unless quite at the end of June, 
when a slight decline, corresponding with that of the rain, was 
aaoticed. In box G no perceptible relation was observed. 
