142 
EOTAL HOETICULTUEAL SOCIETY. 
second cutting the plants grown in them manifested the highest 
degree of development. 
Ammonia salts produced a medium growth, rather more favour- 
able on the whole than nitrate of soda. 
The mixture of mineral and ammonia produced pretty uniformly 
the highest development ; and the mineral and nitrate was but 
little inferior, though more subject to fluctuation. 
All were in flower at about the same period. The plants in 
• the mineral-and-ammonia box were the earliest to ripen seed, 
while those in the unmanured box and in that treated with 
nitrate of soda were the latest. The plants in boxes 3, 4, and 6 
were the earliest to feel the effects of the drought, and subse- 
quently those in 2 ; the plants in box 5 were the least injuriously 
affected of all. It would thus appear as if the mineral and 
ammonia not only induced the greatest amount of vigour, but 
also the greatest abundance of and the earliest ripened seed. 
The roots on April 22, 1870, were most imperfectly developed 
in box 6, were better in box 1, and best of all in the mineral 
manure, corresponding doubtless with the increased development 
of the plant noticed latterly in that box. 
Comparing the development of the plant with that in the 
preceding season, we find rather more fluctuation in box 1. Box 2 
exhibits about the same relative condition till after the second 
cutting, w^hen the plants attained greater development than at 
any time in the preceding year'.' The eff'ect of a check such 
as that caused by the cutting, would not be relatively so in- 
jurious to a plant of low vigour, other things being equal, as to 
one in which growth was more active. Moreover the plant in box 
2 was less injuriously affected by drought than was the case in most 
of the other boxes. In box 3 the development was about the same as 
last year, with rather more fluctuation. In box 4 the plants seem to 
have attained a higher average growth tban last year, but with 
greater fluctuations. Box 5 is nearly the same as last year. Box 
6 is free from that violent fluctuation which marked its occupants 
in the preceding season. 
The root-growth in No. 2 is the highest this season, instead of 
nearly the lowest as it was last year, the reverse of what was ob- 
served in Dactylis, while in box 6 it is lowest instead of nearly 
highest as in the former season. 
