File:American journal of pharmacy (1878) (14770687605).jpg

Identifier: americanjourn50481878phil (find matches)
Title: American journal of pharmacy
Year: 1835 (1830s)
Authors: Philadelphia College of Pharmacy Philadelphia College of Pharmacy and Science
Subjects: Pharmacy Pharmacology
Publisher: Philadelphia : Philadelphia College of Pharmacy
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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Text Appearing Before Image:
Cailletets Apparatus.—The hollow steel cylinder A is fastenedto an iron frame by the straps i?, and when filled with water throughthe cup G, a very high pressure may be produced in any vessel withwhich it may be connected, upon turning the large hand-wheel M, thehub of which, revolving in the journal-box jP, forms a nut, by whichthe square-threaded screw of a steel plunger is worked. The flow ofwater is controlled by a screw plug operated by the small hand-wheelO, whereby also the pressure exerted upon gases may be suddenlyrelieved. The water is forced through a small metal tube into thehollow cylinder which is supported by the tablet />, and capable ofwithstanding a pressure of 900 to 1,000 atmospheres, measured by the i88 Liquefaction of Gases. f Am. Jour. Pharm.( April, 1878. gauges N and N. a contains the mercury reservoir, into which isplunged the glass tube filled with gas. This part of the arrangementis shown in Fig. 4, which is half size.
Text Appearing After Image:
Fig. 4. Fig. 5. Fig. 5 represents the same portion of the apparatus supported on atripod, P, for.use in lecture experiments in connection with any power-ful force-pump. E is a hollow nut for connecting the pipe U, and Nis a plug for closing the orifice in R when the reservoir a is being filledwith mercury. After introducing the open end of the gas tube, T, intothe mercury the other parts of the apparatus are placed in position, as AmAP°rnr;i8?8arm) Minutes of the College, 18 9 shown. The upper end of T is surrounded by the glass cylinder Mycontaining liquid nitrous oxide or other freezing mixture, and coveredby the bell-glass (?, which contains material for absorbing the moisturewhich would otherwise collect upon M and obstruct observation. Theliquid freezing mixture may be withdrawn through the stop-cock r. The water entering through U presses upon the mercury, forcing itinto T, and compressing the gas, which is finally liquefied between band p. The.apparatus is easily managed, and

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