20 
THE MANUAL OF GARDENING. 
ground, shrivel and lose vigour; if it be desired to have them 
later, the better plan is to keep a supply in earth as a reserve) 
fill them with water and place your plants; the water must be 
soft, and just reach through the neck to the upper chamber, so 
that the bottom of the Bulb may be a little immersed in the 
water, not covered ; then place the glasses in a warm room where 
they may at once enjoy light and heat : it is better they should 
be exposed to the sun’s rays than not. By placing them in the 
glasses at proper intervals of time, a succession of flowers may 
be obtained from January to April, forming a pretty ornament for 
the parlour-window or chimney-piece ; they require no further 
care, than to see that the water does not sink so low as to leave 
the roots dry: fresh water must be given at intervals of two or 
three days, to be judged of by the appearance of the fluid, 
whether clear or foul ; when the bulbs are newly planted, the 
change need not be so frequent as after the glasses are filled with 
water. It is essential that the temperature of the water to be 
given, should be the same as that which it is to replace. The 
operation of changing is easily done by one person, when the 
roots are only an inch or two long, but after the flower stems are 
of some length, and the roots nearly fill the glasses, two persons 
become requisite, one to take out the bulb, and hold it, and to dip 
its roots in clear water to rinse them, and another to wash the 
glass, and refill it with water. 
• CHAPTER II. 
THE CONSERVATORY, GREEN-HOUSE, COLD-PIT, 
VERANDAH, &c. — The Conservatory is designed for the re- 
ception of the most rare and beautiful exotics, which are here 
planted in the ground, instead of being placed in pots as in a 
green-house, or hot-house. The conservatory should either be 
attached to, or at least never be separated from the dwelling- 
house ; and from its size, admits of more architectural display 
than other horticultural erections. The principle on which con- 
servatories are constructed, is to admit as great a quantity of 
light as possible, and to obtain a facility of heating and ventilating 
every part. The modes of heating these, and hot-houses, are as 
various as the judgment or fancies of their possessors; but the 
last and apparently the most favourite method is by pipes of hot 
water. 
Conservatories are principally designed for the reception of 
the larger sorts of green-house plants, but stove plants, particu- 
larly the fine flowering, or rarely fruiting kinds, may be thus 
cultivated with the greatest success; for though many plants 
