A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 101
When the temperature of solid substances is raised to1000° they begin to be luminous in the daylight, or, asit is termed, are visibly red-hot. It requires a far high-er temperature to render a gas incandescent. This maybe shown by holding a piece of thin platinum wire inthe current of hot air which… … 88 ARTIFICIAL LIGHT. flame of a lamp. The air is not visibly ignited, but theplatinum wire instantly becomes red-hot, showing a greatdifference in this respect between this metal and a gas.Different vapors and gases evolve different quantitiesof light when ignited. The flame of burning hydrogenis…
Chemistry · Physics
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