Copy 1

Practical pharmacy: the arrangements, apparatus, and manipulations, of the pharmaceutical shop and laboratory / By Francis [sic] Mohr ... and Theophilus Redwood.

  • Mohr, Francis.
Date:
1849
Catalogue details

Licence: Public Domain Mark

Credit: Practical pharmacy: the arrangements, apparatus, and manipulations, of the pharmaceutical shop and laboratory / By Francis [sic] Mohr ... and Theophilus Redwood. Source: Wellcome Collection.

    16/424 (page 4)
    A GAS FURNACES. seared fine wire gauze (fig. 2) is securely fixed, MAIN so as to form a diaphragm, on which eB a7 are put some pieces of broken pumice- stone to fill the upper part of the tube. —_. B, is a gas-pipe from which gas is al- , rig.2. lowed to escape into the tube A, where, on ascending, it mixes with the atmo- spheric air, which has free ingress at the bottom. This mixture of gas and air, passing through the wire gauze, 1s ignited on the surface of the pumice- stone. The wire gauze is used to pre- BoP i vent the communication of the ignition | | to the combustible mixture below it, while the pumice-stone, becoming red- re hot, forms a good radiating surface. The quantity of gas admitted into the tube A, should be such, that the gaseous mixture shall burn with a pale blue flame perfectly free from smoke. MIxEep-GAS FURNACE. re A furnace of this kind may be lighted in an in- heating a plaster spatula, or for any other similar pur- pose; and it occasions no annoyance from dust or smoke. Several of them may be fixed contiguously to each other, as shewn in fig. 3, so that two or more may be lighted at the same time, when required, and a great amount of heat may in this way be produced. Means ought to be pro- vided for conveying away the products of combustion from this, in common with every other, kind of stove or furnace, instead of allowing them to contaminate the air of the apartment; yet the effects of \y j