Annual report of the Storrs Agricultural Experiment Station, Storrs, Conn . and at bottom. The wallis approximately .6 cm. inthickness. The weight ofthe whole bomb is not farfrom 3,200 grams, and itscapacity nearly 380 cc. The cover is providedwith a neck (D). Intothis fits, at the top, a cyl-indrical screw (E), intowhich in turn fits a valvescrew (F). In the neck(D), where the bottom ofthe cylinder screw (E)rests, is a shoulder fittedwith a packing of lead(L,). The pressure on this packing makes a tight closure upon the part of F which it sur-rounds. On the side of D is an opening (G),
Annual report of the Storrs Agricultural Experiment Station, Storrs, Conn . and at bottom. The wallis approximately .6 cm. inthickness. The weight ofthe whole bomb is not farfrom 3,200 grams, and itscapacity nearly 380 cc. The cover is providedwith a neck (D). Intothis fits, at the top, a cyl-indrical screw (E), intowhich in turn fits a valvescrew (F). In the neck(D), where the bottom ofthe cylinder screw (E)rests, is a shoulder fittedwith a packing of lead(L,). The pressure on this packing makes a tight closure upon the part of F which it sur-rounds. On the side of D is an opening (G), into which maybe screwed the coupling connecting the tube with the recep-tacle which holds the oxygen used for the combustion. Thecoupling when screwed in thrusts against a washer of leadat the end of G, which insures perfect closure. A narrowpassage runs horizontally to a point just above the valveseat in the center of D. A similar passage runs from the apexof the valve seat perpendicularly downwards through thecover. These two passages provide a channel for the oxygen. Fig. 1.—Parts of the Bomb. 202 STORRS AGRICULTURAL EXPERIMENT STATION. to pass into the interior of the bomb. This channel may betightly closed by the valve screw, the lower end of which isconical and thrusts against the inner surface of D, the angle ofwhich at the place of contact corresponds to that of the tip ofthe screw. Between the top of the valve seat and the bottomof the packing (L), the valve screw fits so closely in the coveras to prevent the lead of the packing from working downwardand thus obstructing the small gas passages. The upper edge is beveled on both sides; the apex isrounded, and fits into a gasket (K) of lead, which is held in a groove in the cover (B). With usethe metal gradually flows out of thegroove under the heavy pressure sothat the gaskets have to be replacedoccasionally. The gaskets are easilymade and extra ones are furnishedwith each bomb. One difficulty inscrewing the col
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Keywords: ., bookcentury1800, bookdecade1890, bookidan, booksubjectagriculture
