Society of Glass Technology · [Sheffield] · leaf 694
was made about 2 mm. The smallhole through which the mercury retxirned fromthe condenser to the reservoir should be about1 mm. diameter. The jets through which theair and mercury vapour were carried weretwelve in number, each having a diameter ofabout 0-5 mm. The apparatus was best con-structed… … Fig. 159.17 250 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY.
Glass
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