Society of Glass Technology · [Sheffield] · leaf 557
ther means. In the formshown in Fig. 105, air and gas suppliedthrough B and C are mixed in a body,/^, and heated in long, narrow outlettubes, E, which may be of heat-resist-ing alloy, by annular burners, 77,surrounding the tubes and suppliedwith a portion of the mixture. Regu-lating screws, G,… … Fig. 10.) OlTlCS AND OlTiCAL INSTRUMENTS. 170 ilames. The tubes, PJ, may be bent to secure a line acljust-menl of the position of the flame. Fig. 106shows a unit adapted to be fitted into anyform of burner. The preheating burner com-prises a bush, /, extended to form a lanterncarrying a disk, L,…
Glass
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