Considerations on the medicinal use and on the production of factitious airs / by Thomas Beddoes, M.D. : part II ; by James Watt, engineer .... ; to which are added communications from Doctors Carmichael, Darwin, Ewart, ... and others.

  • Beddoes, Thomas, 1760-1808.
Date:
1795
Catalogue details

Licence: Public Domain Mark

Credit: Considerations on the medicinal use and on the production of factitious airs / by Thomas Beddoes, M.D. : part II ; by James Watt, engineer .... ; to which are added communications from Doctors Carmichael, Darwin, Ewart, ... and others. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    191/384 (page 5)
    tion of comman air, and alfo for the patient to inhale from. i. .Tbe Alembic and Fire-tube. The AUmbic A, fee plate 4. is made of foft caft Iron, about half an inch in thicknefs, and fix inches In diameter In its wideft fixt 01 bilge. It has a Capital B, of the famre metal, the lower part of which is made conical and ground into its piouthj ;fp that thejjoint may be made tight with a fmall quantity pf cement. Through the middle of the upper part of the Capital paffes the Water-pipe D C, which reaches to within a fmall diftance ot the bottom of the Alembic; at the top of it is a cup D, to contain water, in the centre of which a wire E, is placed, extending within the Water-pipe to C, where it terminates in an acute cone, accurately fitted to the lower opening of the Pipe as fhewn m plate jig. 5. The upper end ofthls wire has a button affixed to it to turn by hand, and the part immediately under it is formed into a fcrew, which works in a bridge fixed acrofs the cup, fo that by turning the fcrew, you may either raife or deprefs the wire, and thereby regulate the quantity of water to be adrfiitted, or entirely exclude it. The joints of the Water-pipe at C, and at the top of the Capital are made conical for the greater facility of rendering them tight, by anointing them with a fmall quantity of the china clay or other lute here- after defcribed ; which is likewife to be applied to the joint where the ConduBing-pipe F, enters the fide branch of the Capital. The Alembic above defcribed, may be ufed for pro- ducing any of the artificial airs, and feems the befl veffcl for making that from Zinc. At the time this defcrip- tion was firfl publifhed, it was thought that it would have A 3 proved