DESCRIPTION OF A PINE PIT. 
63 
taclied to assist their sliding. Astrickles or sasli-bars three-quarters 
of an inch thick and one inch deep : rafters ten in number, four 
inches thick and seven inches deep, grooved one inch deep for the 
sashes to slide in ; the bottom \of the rafters to be levelled off. It 
will be necessary to have eight ventillators, four in the back wall (c) 
and four in the front (d) to admit the steam of the dung from the 
cavity (e) amongst the plants when required ; in the back elevation 
are fixed nine shutters (f) three feet high, made of good three-quar¬ 
ters inch red deal, to be pannelled and made to slide. Round the 
inside of the pit is fixed a hot-water pipe (g) of four inches broad, to 
give a greater heat when found necessary, although it will be seldom 
wanted. All the bottom of the pit must be filled with stones, to 
about two feet six inches deep, to allow the steam of the dung to 
work freely; then upon the stones, instead of laying tan, old leaf- 
mould may be used, filling up to the height required for plunging 
the pots. This system will be found to supercede the use of bark, as 
the heat is more safe and regular, and we may probably calculate 
that one half or more of the pine plants which perish, receive chief 
of their injury from burnt roots. When at work, keep up the heat 
to 90 degrees Fahr. and if there is not sufficient moisture to be ob¬ 
tained from the use of the ventillators, water betwixt the pots with a 
fine rose watering pot on the leaf-mould; give but little air, and that 
always at the back shutters, and never at the front; and if the range 
of the thermometer be kept from 90 to 100 degrees, and keep a suf¬ 
ficient corresponding moisture, very fine fruit in a short space of 
time, with but little trouble and expense may be expected. 
James Waldron. 
PROBABLE EXPENSE OF ERECTION. 
£. s. d. 
Bricks 4464, mortar, labour, &c. 18 4 6 
Wood work, all included. 19 10 0 
3rds glass, 6 by 4, at 7id. per foot, 270 feet. 8 8 9 
Putty, labour, &c. 2 5 0 
Paint. 4 0 0 
Ventillators, 8 at Is. 6d. each. 0 12 0 
Whole cost of erection, £53 0 3 
Plot-water Apparatus not included. See Vol. 1, page 682. 
