CONSTRUCTION OP PLANT-HOUSES. 
7 
open to view, and are then easily rubbed out; a little practice 
will enable any one to do it quickly and with certainty. 
The next point with which I am at issue is, the keeping of the 
seed until spring before it is allowed to vegetate, this must be 
wrong; as they are loosing vitality throughout all this time, and 
when they do grow, have lost so much of the season that it is 
hardly possible to induce one in twenty to bloom the same 
season. 
Will it not be better to sow directly a sufficient quantity is ob¬ 
tained ? that the plants may get through the first stage of their 
infancy, and be in a condition to advance with the increasing genial 
w T eather of spring, and thus render their blooming in the follow¬ 
ing summer a matter of certainty, instead of chance; the little 
additional trouble which the young seedlings will occasion in the 
way of potting and watering, will be met by the saving to result 
with respect to the spring sown ones in the following year : be¬ 
cause if we can bloom all the seedlings of the current season, of 
course it will do away with the necessity of preserving any of the 
worthless varieties, which otherwise must be kept until they can 
be proved. 
Again: it seems to me a reprehensible practice to stint young 
plants of this kind, and cannot be the best method of inducing 
them to bloom, especially as in this case the size of the flowers 
must be materially deteriorated. I think it will be found far 
preferable to adopt a liberal treatment, supplying the necessary 
stimuli, heat, moisture, and change of soil whenever required, 
and in quantity sufficient to meet every demand; thus the pro¬ 
gress of the plants will be an uninterrupted course of vigour, and 
the resulting bloom most satisfactory. Hortulanus. 
REMARKS ON THE CONSTRUCTION OF PLANT-HOUSES. 
The erection of glazed structures for the cultivation of plants, 
either as ornaments, or Tor their usefulness as dietary articles, is 
becoming of such frequent occurrence, and will probably from 
the lessened cost of the principal material required, be so ex¬ 
tended, that in a few years a greenhouse will be considered a 
