Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 535
ens burner, b, fig. 124, in front of the lamp, so that the beam, whose decomposition is to form our spectrum, shall pass 34 510 HEAT A MODE OF MOTION. LECI. XTH. through the flame. In a little spoon of platinum-foil Iplace a bit of the metal sodium, about the size of a pea.After forming the… … the yellow of the spectrum. But the effect is not yet atits maximum. After a little time the sodium bursts intointense combustion, discharging a vast amount of vapour.At the same moment the yellow of the spectrum is utterlyabolished, a bar of intense darkness, d, taking its place.1On withdrawing…
Heat
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