Issue 12 and Volume 32.

CORRESPONDENCE FIREPROOF WOOD. To the EDITOR: Are all the deductions of Prof. Norton and Edward Atkinson, of Boston, to be received as infallible utterances because the are condemnatory in toto of fireproof wood? Surely the gentlemen in question are confounding fireproof and fire-resisting, which are certainly not convertible terms. The first is really an incorrect word to use, and is equally incorrect when applied to paints. Fireproof wood so called is simply wood impregnated with chemicals, whose end is, when exposed to excessive heat, to keep back, sometimes to prevent altogether the formation of certain gases which issue from the burning wood, and, being inflammable, cause the fire to spread. The chemicals, in their turn, give off other gases, which, if they do not completely hinder the ignition of the gases from the wood, at least keep them down. Thus the wood is rendered no longer a good, but a…

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