Show Meted Metal Iron Is UIe most used by man maD yet the 1 II by far tar commonest common common- est flit In the earths earth's rth's crust Is not Iron but calcium Forty per cent of limestone Is calcium Calcium alum Is a very light metal easH easily hammered easily drawn out Into wire end nud almost as 89 pretty In color ilor as aa IOl gold Why then you may jik do we oat net make more use of It In There are two treasons the first that It Is very fry suit to Isolate from It Its II ores but hut the second Is le worse When let the t merest drop of moisture mole mol tUft tore touch catch calcium m and It fizzes fizzell away Into slaked lime The present price of nf calcium c-al c lam Is at nut twenty times that of If f cold |