0\ T THE CULTURE OF TIIE CUCUMBER. 
49 
heated water would supply a genial warmth to the soil and 
the roots: attached to the same boiler which heated the water 
a, Ground level. b, Pathway. c, Lowest point excavated, on which 
abed (o) may be made for rhubarb, &c. d, lank, supported by brick 
piers (p)- c, Pipes for the supply of atmospheric heat. f, Apertures 
for the admission of air, which passes through the chamber <7, into the tank, 
by a series of openings at h, and thence into the house by the tubes m, 
escaping through the ventilators i. m, Bed ot soil on which the plants 
grow. 
in this tank, a series of pipes might be so arranged as to supply 
heat to the atmosphere above the tank, which would be con¬ 
structed so as to be as near the glass as circumstances would 
admit: a shallow bed of soil would be placed, resting on a due 
portion of open rubble for drainage ; the upper surface of the 
tank would be rendered level, so as to admit of water being 
poured in quantity among the loose drainage, which would ul¬ 
timately, by the agency of the heat below, be induced to rise 
among the soil in the form of vapour, and thus duly supply it 
with moisture. Beneath the tank, an open space would admit 
