Show theair la 10 the tb W world 14 the heaviest thili abl la in the world 11 the metal osmium the bluish whit whits metal with violet luster which smithson tennant discovered 90 years abote the residue from dissolved platinum nain oreil ore thia this metal has a specific gravity ot at 22 that ot at gold being bein 1026 lead 11 iron 7 79 and lithium tt it lightest only 0 the french cheo chem lajoly lt Joly determined that 0 osmium te Is likewise the moat most infusible of metal it could never be made to yield to the oxy hydrogen flame dame which makes pla pi binum tinum aud ad run like vater water but joly has been subjecting camion osal to the exclusively bish high temperature vt the electric arc are which hai has ot of late employed successfully in tin thi mood facture of diamonde diamonds under this altce heat beat the rare metal rothen ruthen lu luB abich bleb used to be deemed all but la in fusible readily melta but osal remains refractory re there being appu 1 ent only the faintest traces of on this account osmium cambium can be art pared in sufficient quantity to make it I 1 very useful in the arts artl but its allor with which defies the acia Is ot of some value better bat ine ing been found wherewith to up tip loll 1011 peas being non magnetic its en em for the bearings of the mu iner a compass has his been advocated |