[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 206
the pumps ;._/// are the points where the bulbsare sealed when the lamps are detached from thevacuum pump. In this pump the mercury isforced by the pressure of air from the bulb B i to 204 ELECTRICITY AND ITS the bulb B 2, driving out the air at the point p.The stop cock / is then closed and the… … the mercury to fall from the bulb B 2 into the bulbB 1. The air in the lamps then distributes itselfthrough the tubes into the bulb B 2 and is againforced out in the manner described, and so on RECENT APPLICATIONS. 205 until a nearly perfect vacuum is obtained in thelamps. Fig. 3 shows the Spreugel…
Electricity
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