Show EMERY TO CORUNDUM on of 0 uie the latest achievements or of the th electric current ao an electric aroris of 0 conle arting emery into corundum by mean ine avils of 0 f the alternate current are arc lids hda lec enily been As A heat rail ani not decoll decomposition la Is aimed it continuous cunetta curt ell ts wall would id be tills this furn tee it iff niad or of fire firebricks briCKS and on two bridges the hollow und rit calls serves am ai a receptacle for or ali the fused UM there being a small hole in tho the bottoni bottom ot of lite furnace iiri Ace this holo hole Is in coy ored with a bla glass ie plate the electrodes carbon rods roil siire are approached to ono one inch to two inches Inc lica tile space 1 lit tween being packed V ith dumpit of carbon the cairy cair tile the finest dust of 0 III allt lie tile me oilier ir with pow doled uio amount alc upon thi the iron roil oxide in it lila emely tor to 25 per ept copt of 0 le 6 cent or carbon it 1 tire th coal la Is eoon burned but ned by the ot of tho iroil oxide and tire hie are arc tonn forms vie inner mass begins to 10 molt aim the glass class plate gives elver way nay and a thearn vf or fused cor flows out the hard arutt crutt is theu broan alth iron ioda and ile new nia ma leidal tel lat thus thu red fed to tire lire this addition slops lh he low starts again after aate r ten or rif fifteen minutes the bage 11 breon 1 I N with ith fine mary powder to protect it II train from the 1110 anten intense beat ln at ot of the fused masis the tb leI corundum Is 1 almost free of tooter vc of chih kllc amei y contains about ei a per cent e it it la 3 crystalline colonl S and ue i thou c quartz pink ur blue tine uc of palph I 1 ft found und lit in druwe arii the ai Q cum nt Is lpt apt rit at M r anil tire the j pres sui in in ur or go avitt |