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34 issues acid alloys aluminum American ammonia amount April Atomic weight Bakelite BEERY Brass Bronze calcium carbon caustic soda cellulose cent chem chemical chemist Chemistry Leaflet Chemistry PAULINE coal color Company compounds contain contest copper cotton Discovered discovery dyes electric element in weight Elementary Chemistry Engineering equipment explosives film furnace gases gold heat helium hydrogen ical important industry iron January known laboratory lamp lead light lime liquid manganese manufacture material ment mercury method mixture Monel Metal nickel nitrate nitric acid nitrogen November October operation oxide oxygen PAULINE G Philadelphia Public Ledger phosphorus pipe plant platinum Pont pounds powder production pure Pyralin Radium rayon Relatives result salt scrap book ship Silicon silk silver soap soda ash sodium soil solid solution steel substances sulfur sulphur tained tantalum temperature tion tons tube ture United Volume X-ray