PIT FOR CUCUMBERS. 
Reference to Ground Plan. —(a.) Steam Boiler, [b. b. b.) Pipes. 
These are constructed of cast iron, two inches diameter outside to 
outside; they are perforated along their sides with holes one quarter 
of an inch diameter as c. c., and half a yard apart hole from hole, to 
prevent the holes from corroding up, a copper bush is fixed in each 
hole. ( d . d.) Stop-cocks to turn the steam off or on, as desired. 
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Reference to end sketch .— (a. a .)—Perforated Pipes. (6.)— 
Flue, which is carried from the ground to about eight inches higher 
than the surface of the soil inside the frame. This is for the pur¬ 
pose of affording top heat, and drying up damps when required. 
This flue has a pipe laid upon a row of bricks, and in a sort of open 
brick drain, the space of the flue above is then filled up with brick 
bats, previous to putting in of which, the flue is plastered at the sides. 
The coverers at the top are stone which are securely jointed. 
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(c) Is a Pit with a pipe laid up the middle, perforated as the 
other pipe in the flue, the pit is then filled with brick bats to the 
depth of two feet six inches. The materials in which can be heated 
