Sept.] THE GREEN-HOUSE. 507 
published in 1805, bj the late Benjamin Smith Barton, M. D., 
Professor of Materia Medica, Natural History and Botany in the 
University of Pennsylvania. 
THE GREEN-HOUSE. 
In the eastern states between the fifteenth and latter end of this 
month, according to local situations, the nights will be getting cold, 
and consequently the more tender kinds of green-house plants must 
be taken in before they change their colour by too much cold, 
leaving the hardy sorts out as long as there is no danger of their 
being attacked by frost. 
Some people are desirous to keep out their plants as longaspos- 
siblej this is very right, but it ought not to be extended to too 
hazardous a period, for one night's frost would cause the leaves to 
lose their fine green colour, which perhaps might not be restored 
during the whole winter, and if any way severe, serious injury 
might be sustained. 
If the windows and doors are kept open day and night, as long 
as there is safety in so doing, the plants will be nearly as well off 
as if in the open air, and no danger is encountered: the mere dif- 
ference of five or six days in the taking in of the plants will insure 
safety; but on the other hand, it is not right to be" too precipitate 
in housing them before the common appearance of the weather indi- 
cates the necessity. 
For further particulars respecting the housing of the plants, see 
next month, which is the period for doing that business in the mid- 
dle states. 
In the middle and other states vvhere frosts do not frequently 
appear before the middle of October, the plants are to be taken care 
of as directed in the preceding months; observing to decrease the 
usual supply of water in proportion to the moistness and coldness 
of the weather, for the administering of it too copiously when there 
is not a necessity, would be very injurious. And let it be particu- 
larly observed, that as soon as the cold nights set in, which may be 
about the middle of this month or sooner, the water must be given 
to the plants in the morning, for if given late in the afternoon as in 
the preceding months, the chill occasioned by it and the coldness 
of the nights, would change the colour of the foliage from a fine 
green to a yellowish cast, whereby much of their beauty would be 
lost, as well as the plants themselves in some degree injured. 
If any are in want of larger pots or tubs, they may be shifted 
in the beginning of this month, but on no account defer it later, 
that the plants may have time to strike some fresh roots before winter. 
And if, in consequence of a bad state of health, any had been plant- 
ed in baskets in the borders as recommended in page 428, they 
