EEPORT ON VABlOrS MAN'TTEES AT CHISWICK. 
29 
tillering was observable in this and in No. 6 than in the other 
boxes. Average height in July 3 inches. 
Box 5. The plants maintained a relatively high degree of vigour 
throughout the experiment, but experienced a slight decline to- 
wards the end of June, when their average height was 4 inches. 
Box 6. The plants maintained uniformly the highest degree of 
vigour throughout the experiment, and in July were the most luxu- 
riant, bright green, and averaged 5 inches in height. 
The plants in all six boxes came up badly, and to the last 
were patchy and irregular. No tendency to flower was observed 
in any of the boxes. The plants in Nos. 1 and 2 at the end of tlio 
experiment were of a lighter colour than the rest. 
In regard to temperature and rainfall, no perceptible relation 
,was observed in the plants in boxes 1 or 2 ; but in box 3 an ad- 
vance corresponding to the increase of temperature towards the 
end of the experiment was observed. 
In box 4 a slight advance in proportion to the increased rainfall 
at the end of May was remarked ; in box 5 a slight decrease in pro- 
portion to the decline of rainfall at the end of the experiment was 
noted ; while in box 6 no perceptible relation between the growth 
of the plants and either temperature or rainfall was remarked. 
iii. Lolium perenne. 
Box 1. No difference was observable in the plants in this box 
throughout the experiment. They presented uniformly the lowest 
degree of development. A-verage height at the end of June 6 
inches. 
Box 2. Uniform throughout the experiment; rather more 
healthy than 1 at the end of June. The plants in 1 and 2 showed 
the effect of drought less than the other four ; the colour of their 
leaves was not of so deep a green. 
Box 8. The plants exhibited a medium degree of vigour 
throughout May ; their growth was checked during June ; and the 
herbage was laid and shrivelled at the end of the experiment. 
Box 4. Medium vigour throughout May ; slight increase at the 
end of the month and early part of June, after which the plants 
became shrivelled with drought. 
Box 5. High degree of vigour throughout the experiment, until 
checked by drought. At the end of May a slight increase in 
vigour was observable, which continued to the end of the experi- 
ment. 
