Dec. 
_themfelves decay ; 
In the mean Time the Contagion of thefe de-. 
~cay’d Leaves would extend itfelf thro’ the whole 
Place, like the Mouldinefs of a Pear or Apple in — 
the Fruitery; and thofe Plants, whofe Principle 
of Vegetation had been fo ftrong that they refifted 
Cold, and at the fame Time giving them fo much 
Air as will prevent their Decay. 
The Difference. between Noon-Day and Night 
is very great in Point of Cold, even in the 
fevereft Seafons: the Air ‘of the  hardeft 
Time is very different when warm’d by the free 
Sun, and when his Influence is obfcur’d. 
On this depends what we have diredtedd for the 
Care of Green-houfe Plants in the Depth of Win- 
ter, and what we fhall fay farther on that Head : 
Let the Gardener keep in Mind thefe few Princi- 
ples of his SOnaett and he will never err 
sou oe | | 
If he-fhould = his Grbentionte phiit up fora 
confiderable Time together, in the faine Manner 
as it is neceffary to ag in the fevereft Nights, he 
would fee the Deftruction of the whole Colleétion 
come on gradually ,; but’ even .the firft Notice he — 
would receive this Way, would be folate, that a 
ereat deal of the Mifchief would be paft Remedy. 
The - Leaves, 
Branches in feveral Kinds, would drop off; and 
by that Time he had Knowledge of this, by the fall- 
ing of two or three, Numbers would have loft | 
their Hold and Means of Nourifhment ; and, in 
Spite of all his Care would follow. ? 
The Plants would be ‘deform’d by this; and 
the next Stage of Mifchief would be} that the 
Branches, from which thefe Leaves fell, would 
and afterwards the Whole. 
the firft Mifchief, would seek like the others 
from the latter. 
This would be the State of a Greenhoufe fhut 
up too. clofe and too long. At the fame Time if 
the Intent of the Building were perverted, by 
leaving the Glaffes too much open, a great Part 
of the Plants would perifh by the abfolute Cold : 
and thefe would be the mott valuable 5 for the 
tenderer Kinds, rais’d with moft Care and Trouble, 
would be nipp’d firft. 
Thefe are the Dangers of the two Extremes : 
_ this is the Seafon in wich they are moft likely to 
happen; and.we therefore take this Opportunity — 
of laying it, in all its Force, before the practical 
Gardeners 
Upon this cece his Condué: muft:be thus 
regulated. Always at Night, in fevere Frofts, 
the Shutters are to be clos’d; and for the greater 
Part of the Day; and fometimes all siti the 
Windows muft be kept fhut. ce 
Whenever the Sun fhines, and the Air is ae. 
let them be rais’d at Noon. This muft be done 
according to the Deeree of Cold: if very fevere, 
a little opening of them only muft be allow’d, 
and. for a little Time; for the leaft will prevent 
Ne 16. 
_ 1s very great. 
‘be fear’d in Winter as Frott. 
for a few Minutes, and then fhut up in the 
|. Greenhoufe,. have known do more Mifchief in 
will require Watering, and in what Degree. - 
him ufe no Water for this Purpofe but what has 
Watering ; 
| will require it moft frequently, the herbaceous ‘in 
the abfolute Stagnation of the Air within. 
In better Days the Opening muft be more free, 
and continued longer ; and the Plants will, a 
that, be enabled to bear longer fhutting up, i 
the fucceeding Days demand it. 
The Difference between a pure and fogey Air 
A thick Fog is almoft as much to 
Such an Air let in 
one Night, than any other Accident, under tole- 
rable Care, could have done in a Week. 
All the Time the Greenhoufe is oblig’d 
to be fo much fhut up, let the Plants contain’d 
in it have very little Water. 
lefs than at ether Times; and nothing will more 
contribute to the Damage they may receive from 
being kept clofe, than the Addition of that Damp 
, ick, the Warmth’ of the Air will raife from the 
| wetted Earth. 
toward the Extremities of the | 
Decay of the Parts is what is drctilbd: and no- 
thing will promote that fo much as Clofenef, 
Heat, and Moitture. — : 
The Care of the Greenhoufe being thus once 
well underftood, fhort Leffons will ditect its Ma- 
nagement on fucceeding Occafions. 
Every thing being well septa there, 
let our Gardener look into his Stove: let hint fee 
by the Afpect of his Plants, as well as by. his 
Thermoineter, that the Air is properly heated. 
If the Plants fhoot too freely, let him a little 
flacken the Degree of Fire; and if they appear 
faint at the Ends of the Branches, let him: a little 
encreafe it: 
Let him now well diftinguith whidh r “ Plants 
Let 
ftood a Day and Night in the Stove, and 
give this very fparingly to thofe which moft re- 
quire it, fuch as the Shrubs and Plants of a firmer 
’ Structure, and fcarce any to the Cereus Kinds, 
Thefe have no Leaves to lofe, therefore there is 
lefs Danger of their wanting Moifture; but with 
Regard to the others, as the Heat of the Air keeps 
them perfpiring, they muft be fupply’d propor- 
tionably-at the Root, or they will be ftripp’d one 
by one of their Leaves, as the Plants in the 
Greenhoufe will from Over-clofenefs. 
- We have given particular Directions under the 
diftint Heads, for the Management of thofe 
Plants of which we have treated with Refpect to 
but, in general, the woody Kinds 
a middling Degree, and the fucculent leaft. 
Thofe which require moft fhould have it allow’d, 
them, not by an Increafe of the Quantity, but by 
repeating it the oftener ;. for it will always be for 
the Advantage of .the Plants in general, in the 
Stove, not to water too many at a Time, nor 
thofe too largely. 
Cie SEB C-F. 
They will require — 
Dec, 
