The London, Edinburgh and Dublin philosophical magazine and journal of science . p. Porous and b, desiccating tubes. The wires being within the tube, one or other of the lampsmust always be shining so long as there is a current, whetherthe apparatus be in an atmosphere of fire-damp, choke-damp,or air ; and to prevent the mercury being driven out of thetube by too much pressure, bulbs are arranged on either sideas in fig. 3, which presents a diagrammatic view of theapparatus. We have found an internal diameter of tubingof about 3 millim. best adapted for ensuring easy mobility ofthe mercu
The London, Edinburgh and Dublin philosophical magazine and journal of science . p. Porous and b, desiccating tubes. The wires being within the tube, one or other of the lampsmust always be shining so long as there is a current, whetherthe apparatus be in an atmosphere of fire-damp, choke-damp,or air ; and to prevent the mercury being driven out of thetube by too much pressure, bulbs are arranged on either sideas in fig. 3, which presents a diagrammatic view of theapparatus. We have found an internal diameter of tubingof about 3 millim. best adapted for ensuring easy mobility ofthe mercury. The presence of the wires within the tube hasinterfered with the perfection of the seal; this we have over-come by the introduction of a little concentrated sulphuric acid,which also serves the purpose of preventing sparking and oflubricating the interior. The use of sulphuric acid necessi-tates the addition of desiccators a and b, fig. 3, to each endof the tube ; but in cases where it has been found advisablenot to use sulphuric acid, both the acid and the desiccatorshav
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
