The anœsthesimeter : a new apparatus for the administration of chloroform / M. Duroy.

  • Duroy, M.
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: The anœsthesimeter : a new apparatus for the administration of chloroform / M. Duroy. Source: Wellcome Collection.

    13/42 (page 5)
    upon the axis, to pass as seen in Y', fig. 3. The course of the nee- dle is limited by the slit Z'; it stops consequently at the two ex- tremities numbered 1 and 5. Going downwards, this small scale, 1, 2, 3, 4, 5, engraved on the rim of the slit, marks the degrees of the Ancesthesimeter. XX (fig. 3), two diverging guards, between which are clasped the long branches of the syphons. Management oe the Appaeatus. The Anoesthesimeter being put together according to the plan Xo. 1, and its stop-cock C closed, the liquid is introduced by the orifice A of the reservoir, and the stopper immediately replaced. Xow suppose Chloroform poured in up to the 16th division (say 16 grammes), and the pressure of the air observed to be exerted thoroughly in the interior of the jar MM', just as in the little vase with the syphons X, by means of the communication which exists between the atmosphere and the air in the interior by the tubes JJ'. As soon as we open the stop-cock C, several bubbles of air will be introduced at the bottom by the aperture A, will be seen traversing the liquid in the reservoir, and an equivalent quantity of Chloroform will immediately descend into the little vase X, yet the flow of Chloroform will always stop as soon as its level in X touches the extremity A of the orifice, for then the simple atmospheric pressure, which is exerted upon the surface of the liquid in X, will sustain the column of Chloroform in the superior vessel A. But as on the other hand the small syphons, furnished in the interior with fila- ments of cotton, dipping into X, have the property of absorbing by capillarity, the Chloroform will ascend in the tubes, follow their course, and fall guttatim on the tray TJ; the level of the liquid will instantly sink in the vase X till the extremity of the channel A is uncovered, and allows the entrance of air again into the reservoir; then the level will re-establish itself incessantly, until all the liquid in the great reservoir is exhausted. The above detailed arrangement constitutes, we see, an apparatus