Up: Glassmaking
Gilbert: 58 of 65
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FIG. 93
MAGIC
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down toward the wick from above (Fig. 93). Does the lamp light
in a most magical manner before the match touches the wick?
Repeat this with a kerosene lamp and with a
candle. Do they light in the same magical manner?
The "why" of it
When the lamp is lighted, the alcohol or
kerosene turns to gas, and it is the gas which burns; when the
candle is lighted, the wax turns to an oil, the oil turns to a gas,
and it is the gas which burns.
The gas rises from the wick for a short time
after the flame is blown out, and it is this gas which lights when
you bring the match down toward the wick.
Experiment 71. Air used by flames.
Drop melted candle wax on a tin can cover
and attach the bottoms of two candles to the cover (Fig. 94); use
one candle about
FIG. 94
THE CANDLES GO OUT AND THE WATER RISES
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