March.] THE HOT-HOUSE. 309 
Propagating by Cuttings, Layers, Sfc. 
Propagate, by cuttings and slips, various shrubby green-house 
plants, as myrtles, geraniums, fuschias, oleanders, hydrangeas, 
jasmines, coronillas, justicias. Sec. The young shoots planted in 
pots, and placed in a hot-bed, will soon strike root and grow free- 
ly; or where tliere is the convenience of bark-beds, either in a hot- 
house, or under any glass frames, Sec these, and many other sorts, 
if plunged therein, may be struck very expeditiously; or, if at the 
same time, some are covered with a hand-glass, it will still more 
expedite their rooting, givmg proper waterings. 
Likewise propagate shrubby kinds by layers, and also different 
sorts by suckers, 8cc. 
THE HOT-HOUSE. 
Fruiting Pines. 
It is en a diie proportion of air admitted into the Hot-house, 
that the goodness of the pine plants in a great measure depends. 
The want of it will cause them to grow with long leaves and weak 
stems, which plants, never produce good fruit. 
On the other hand, air admitted in too great a quantity, or at im- 
proper times, will injure the plants, and cause them to grow yel- 
low and sickly. 
In the depth of winter, during the time that the plants are nearly 
in a state of inaction, the hot-house will require but very little air; 
yet it will absolutely be necessary to take every favourable oppor- 
tunity to let out the foul air, and admit fresh, when it can be done 
with safety to the plants; the letting down the glasses a little way, 
even for a few minutesi in the middle of the day, is of more impor- 
tance than inexperienced ])ersons can conceive, especially when 
there is a little sun and a mild wind. But at this season, particu- 
larly in the advanced part of the month, to have regard to the words 
give air on the botanical thermometers, is not necessary, for a lit- 
tle may with much safety be given, although the spirits should not 
rise higher than 62 '' of Fahrenheit, or six or eight degrees above 
temperate. 
It will be necessary to continue a regular degree of heat in the 
house, as directed last month, by keeping up a fire-heat every even- 
ing, night, and morning, but more particularly in severe weather; 
