Mowat, Harold, 1883- · London : H. Frowde · leaf 54
gas supplyor by a specially made contrivance shown in theillustration. The other tap is used partly as an SOURCES OF SUPPLY, ETC. 39 indicator, as when it is opened not only is any airin the break allowed to escape, but if a match isplaced to it and the flame burns normally, we knowthat the break… … Fia. 12. Gas-bag foe, use with Mercury Break. This instrument for supplying gas to a mercury break is made of rubber.A is attached to a gas supjaly and the cock c is opened, and gas enters thebag. When nearly full, the supply is tiu-ned off and the gas in B is forcedinto D. c is then closed. A is…
X-rays
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