| Show AS A FIRE preventative tests recently made by the bureau burau of mines it port the university of california berkeley calif indicate tw tillit land cement will stand up in a liot hot fire th le 1 cy jn in ing of timbers will prevent the starting of a mine f ire the he or the spread of flames through the ita stand nd magnesium cement slabs didiot did n i scaled aled up tip under tinder the first test the crumbled to powder and conclude off permitting the slabs to ignite it is reasonable to that head frames shaft collars shaft timbers shaft stations fact all timbering in permanent underground work eluding mule barns ventilation doors power s hoist stations timbered haulage ways and tan fan station 61 the e can be effectively fireproofed fire proofed by boatin doaga y surface transforms houses assay offices bowder pa c co W kincs zincs and other buildings building scan can be fireproofed fire proofed by S enfOrced ings or the buildings can be made entirely ot of re r |
