Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 395
cr. xiu. of the metal need a mediator, and this they find in thevarnish. I have now to prove to you that a metallicsurface may be varnished by a gas. The arrangement before you enables me to to cause athin stream of olefiant gas to pass from the gasholder G(fig. 104) through a slit tube a b, over… … surface is actually cooled by the passage of the gas, forthe gas has to be warmed by the metal, the radiationis considerably augmented. As soon as the gas begins toflow, the needle begins to move, and reaches an amplitudeof 45°. We have here varnished a metal by a gas, but a moreinteresting and…
Heat
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