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Fig. 5— A hollow walled pit, on the plan of T. A. Knight, Esq. with a tan or other pit in¬ 
side of fermenting matter, (a) Hollow wall. ( b) Drains, (c) Air-Drain to force the heated 
air in the hollow wall into the atmosphere of the pit through the holes {g). Linings of hot dung 
(d) are placed to heat the air in the hollow wall, (e) Ground level. (/) Hot-water Pipes to 
dry the air of the pit in damp weather, or winter, (h) Part of the Ground Plan. 
Fig. 6.—An excellent and cheap Pit for early forcing; dung or tan inside, and a good dung 
lining behind. 
Fig. 7.— (a) Seat along the back of the pit, for accommodation in vine-dressing, thinning, &c. 
p, G> g._Excellent Chambered Pit with dung linings for early forcing Grapes in pots, with 
a bed of tan or leaves. The lights require to be removed to dress them, (a) Air-Drain. ( b ) 
Plugs, (c) Air-Chamber. This makes a good Pine-Pit. 
