. The literary digest. ly to be pn^sent in ordinary fire-fighting conditions met by fire , in all of tliese eases there islikely to be a deficiency of ox.\gen. There-fore, for ade«iuate protection against theseconditions the oxygen-breathing apparatusnmst be used, and rlia7ico on the armymask may be fatal. The Bureau of Mines is working on acarbcn monoxid mask and hopes to de-veloji one that may be usetl in the futurefor low concentrations of this gas, but sucha mask is not now a\ailable. Ammonia is another gas that will pen(»-trate the standard army canister. How-ever, a s

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. The literary digest. ly to be pn^sent in ordinary fire-fighting conditions met by fire , in all of tliese eases there islikely to be a deficiency of ox.\gen. There-fore, for ade«iuate protection against theseconditions the oxygen-breathing apparatusnmst be used, and rlia7ico on the armymask may be fatal. The Bureau of Mines is working on acarbcn monoxid mask and hopes to de-veloji one that may be usetl in the futurefor low concentrations of this gas, but sucha mask is not now a\ailable. Ammonia is another gas that will pen(»-trate the standard army canister. How-ever, a special chemical may be placed inthe army canister which will adapt it foruse around rcfrifrerating plants. The self-contaiiu>d ox\ gen-bn>athingapparatus can never be displa en-countered in mine-rescue work, in , blast-furnace stoves, ;*olin«> tanks, The Literary Digest for March 29, 1919 1^29.

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Keywords: ., bookcentury1800, bookdecade1890, bookidliterarydige, bookyear1890