Heath and Frost

Heath and Frost patented in 1877 the use of a water-retaining paste such as soap 5, starch 0.5, glue 0.5 water 94% for tamping bore-holes, loaded with dynamite, in order to prevent the ignition of firedamp Ref Daniel (1902), 371... 

Heath and Frost proposed a modification of the miner s safety lamp so that it was possible to use it to heat a small piece of iron to incandescence which could then be touched to the open end of a fuse. This operation was done in such a manner that no flame or spark was produced outside the enclosure of the lamp (Ref 1)... 

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See also in sourсe #XX -- [ , ]

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