NEW HOLLAND PLANTS. 
219 
have a house that is equally manageable in one season as the 
other, for though, as before remarked, they are greatly improved 
under favorable circumstances by this protection at all times, it 
may be readily imagined they will not bear the roasting of a 
southern exposure to the fervid heat of a July sun. 
Where accommodation of the kind cannot be afforded, the 
plants must be removed to the open air from the time when 
the increasing heat of the season begins to make it a matter of 
difficulty to keep them cool enough, until its decline permits their 
return; during this period, however, they are subject to such 
sudden and extreme fluctuations of heat and moisture, that their 
summer management, instead of being the easy thing some suppose 
it, is by for the most troublesome of the whole year, and hence 
the advantage of having them constantly under protection, where 
it is of a kind that will allow their requirements to be attended 
to. A “New Holland house,” as it is called in gardening phrase¬ 
ology, should be built as light as possible, standing in the position 
named ; the roof should be brought near to the plants, which we 
hold to be a better direction than that which recommends the 
elevation of the latter near to the roof, inasmuch as in the one 
case there is a great saving of heat, and, in the other, there is a 
waste of it necessary to warm a considerable unfilled and useless 
space; the whole of the sashes should be made to move, or, at 
any rate, very efficient means secured for ventilating, that a full 
and free supply of both light and air may be ensured for the 
time when both are required in an unlimited quantity. The means 
of heating should be of a character at once ample and easily con¬ 
trolled ; it matters little what system is employed, so that the 
desired object is attained in a simple and inexpensive manner, 
which is merely to guard them from a depression of temperature 
to a point below 35°. True it is, they will bear several degrees 
of frost without apparent injury at the time, but it is not good 
management which allows them to become frozen at all, and 
where this tribe is cultivated by itself, the minimum temperature 
they should ever experience is far more safely stated at 40° than 
lower; they do not indeed evince any impatience of cold to an 
extent of 5° or 6° of freezing at the time it occurs, but in most 
cases its effects become apparent when the plant’s seasonal action 
should commence; instead of then breaking vigorously and ex- 
