Langley of the Allegheny observatory has made a direct comparison between the heat of the sun and that of the flame in the mouth of a Bessemer steel convertor. [Please select]
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The flame of the convertor is not so hot as the melted steel from which it comes, but it offers better opportunities for observation. [Please select]
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The steel itself as it was poured from the convertor was found to be not more than one-sixty-fourth as hot as the sun. [Please select]
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