and salt, simply bya backward motion of the same crank, an advantage soapparent that no one can fail to comprehend their utilityand great importance. The editors of the Scientific American, a well-knownjournal, devoted to mechanical science, in an articleon this subject, thus refer to the value and… … Our illustration is a perspective view, with part ofthe outer tub, A, removed to show the interior. Thecylinder, C, is capable of revolving in one direction bythe handle, F, that is attached to the agitator, E, whichis provided with a series of blades, c, and a woodenscraper, e, that is kept…
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep01muss-480-79.webp)
