Journal of the Philadelphia College of Pharmacy (1834) (14762589721)

Identifier: journalofphilade05phil (find matches)

Title: Journal of the Philadelphia College of Pharmacy

Year: 1834 (1830s)

Authors: Philadelphia College of Pharmacy

Subjects: Pharmacy Pharmacy

Publisher: Philadelphia : Philadelphia College of Pharmacy

Contributing Library: Francis A. Countway Library of Medicine

Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

Text Appearing Before Image:

of the plate, two stoutbrass wires are inserted, one of them insulated by a collet ofleathers, so as to admit of the ignition, by a galvanic discharge,,of a small arch of platina wire, which terminates them. Thesliding rod above mentioned as occupying the stuffing box,,terminates below the plate in an elbow which supports a cupat right angles to the rod, at the same distance from the rodas the platina wire, and on the opposite side of it, there is abrass cover, H, for the cup, supported from the plate. Thearrangement is such that by a suitable movement in thesliding rod, made by grasping it by the handle G, in which itterminates externally, the cup may be made either to receiveinto its cavity the platina wire, or to adjust itself to itscover H. The bell being removed, about sixty grains of potassium inpieces not containing more than fifteen grains each, are 244 APPARATUS FOR THE EVOLUTION OF SILICON FROM FLUOSILICIC ACIDGAS, BY MEANS OF POTASSIUM AND A WIRE IGNITED BY A CALO-RIMOTOR.

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Apparatus and Processes. 245 to be introduced into the cup, which is then to be adjusted tothe cover, and the bell secured. In the next place, by meansof the flexible lead tubes, P, P, P, P, and the gallows screwsattached to the valve cocks, establish a communication seve-rally with an air pump, a self-regulating reservoir of hydrogen,a barometer gage, and a jar over the mercurial cistern con-taining fluosihcic acid gas. First, by means of the air pumpexhaust the bell, and in order to wash out all remains of at-mospheric air, admit hydrogen from the reservoir. Againexhaust, and again admit hydrogen. Lastly, exhaust the bellof hydrogen and admit the fluosilicic acid gas. By means ofthe gage, the exhaustion is indicated and measured, and bythe same means it will be seen when the pressure of the gaswithin the bell, approaches that of the atmosphere. Whenthis takes place, the cocks being all closed, by means of acalorimeter, the platina wire is to be ignited, and the pot-assium brought in

1834 wissenschaftliche Zeitschriften Geschichte der Pharmazie Buchillustrationen Medizin Apotheke Pharmakologie hohe Auflösung Bilder aus dem Internetarchiv

1834

Francis A. Countway Library of Medicine

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