Popular science monthly . work, are not so dirty and areready for instant use. A new handduster for aj^pKing dry sprays is novel inprinciple as well as design and is by farthe most efficient de\ice which has yetbeen in\cntcd. The powder is containedin a large metal reservoir, within whichthe pumj) mechanism acts. Kach mcne-ment of the jiiston automatically meas-ures and ejects an amount of dust regu-lated b\ the force imparled to the is double acting and will throw a cloudof dust or powder up or down or in anyother direction. With this new dustera single puff of arsenate of lead wil
Popular science monthly . work, are not so dirty and areready for instant use. A new handduster for aj^pKing dry sprays is novel inprinciple as well as design and is by farthe most efficient de\ice which has yetbeen in\cntcd. The powder is containedin a large metal reservoir, within whichthe pumj) mechanism acts. Kach mcne-ment of the jiiston automatically meas-ures and ejects an amount of dust regu-lated b\ the force imparled to the is double acting and will throw a cloudof dust or powder up or down or in anyother direction. With this new dustera single puff of arsenate of lead will com-pletely co\er a potato plant with thepoison. All vegetables and small fruitsand even low trees may be quicklysprayed with poison or with sulphurwith a minimum of effort. The duster may also be used as ahouse disinfectant, discarding the arse-nate of lead for a non-poisonous liquidor powder. No corner is beyond reachof the duster, and the acids used assprays do not injure it. How the Snails Tongue Cleans theAquarium.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
