| Show pumice stone pumice heldt fron from its 18 use aa an a cleaning agent lr brotia otia to the meet most important polishing tem lancea while 10 emery Is t used for toole VW po p pipe ipe r tore and glase glass ox ido wo of iron fur cm one glassware and lime tor metals stone i employed for polishing softer artl elps stone nis a fnlund in nature I 1 is am ftc to its coin composition position not nothing hint but lava ablen he bps received aft fr malle ity through the fact that 1 the vol vo stone substance eube ianco wa was cooled very rapidly andor strong development of 0 gases |
