Abstract
Some further work on the flammability of fabrics is described and an empirical equation is derived for the vertical flame speed in terms of the distance and time of spread of flame on the flammability apparatus described in British Standard 476 : Part 2 : 19551. This relationship, which is the basis of the figure of merit in the British Standard, is considered to be more reliable than the equation relating distance of spread and flame speed given in an earlier paper2.

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