. Bulletin of the Department of Agriculture. Agriculture. BULLETIN 186, V. S. DEPARTMEXT OP AGRICULTURE. FUMIGATION CHAMBER. The fumig-ation chamber (fig. 1 and fig. 2, h) is of iron tubing, 36 inches long by 12 inches in diameter. One end of this cylinder is per- manejitly closed with a heavy iron cap (fig. 1, a). The other end is fitted with a flange and can be closed with a brass plate (fig. I, h), which is held ii^ place by clamps. One face of the plate is ground to fit the flange, wliich is also ground. A wide rubber gasket is phiced b(>tween the two faces when the plate is clampe
. Bulletin of the Department of Agriculture. Agriculture. BULLETIN 186, V. S. DEPARTMEXT OP AGRICULTURE. FUMIGATION CHAMBER. The fumig-ation chamber (fig. 1 and fig. 2, h) is of iron tubing, 36 inches long by 12 inches in diameter. One end of this cylinder is per- manejitly closed with a heavy iron cap (fig. 1, a). The other end is fitted with a flange and can be closed with a brass plate (fig. I, h), which is held ii^ place by clamps. One face of the plate is ground to fit the flange, wliich is also ground. A wide rubber gasket is phiced b(>tween the two faces when the plate is clamped in position. The chamber is designed to lie with its longest axis in a horizontal position. On the side of the chamber intended to lie uppermost three openings are made, one being in the center and one at each end. The openhxg CZ w â ^wwwwwwwwwww jjssssssss^ / .^^^^^â v^^^^^^^'vv^^^^v^^'^^^^^^'^^^â ^'.^^^^^^^^«^v.^^^^^^^^^^^.^^^^^^^. ML Fig. I.âDiagram of fumigation chamber: a, Iron cap; b, brass plate clamped on end of chamber; c, gas cock for attachmg suction hose; d, vacuum gauge; e, dropping funnel, by means of which the sulphuric acid is introduced into the chamber: /, beaker to contain cyanid. near the capped end is fitted with a gas cock (fig. 1, c), so that the suction hose of a vacuum pump can be readily attached. A vacuum gauge, registering the decrease in })rcssure in units equivalent to inches of mercury, is placed in the center opening (fig. 1, d), wliile a tubula- ture is placed in the opening near the flange. The tubulature is closed with a perforated rubber stop})er bearing a dropping funnel (fig. 1, e) so arranged that the bulb and stopcock are outside the chamber, while the tube extends down inside the chamber nearly to the bottom. The rubber stopper and dropping funnel can be readily removed when seeds or other material to be fumigated are placed in the chamber. An air pump, driven by a motor and capable of reducing th? air pressure to the ecjuivalei
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
