About Alum

Orainary alum i doublé sulpliato f Dotash mul alumina oontaimng rhen ïrvstaUizerl. twonty-four moloo.s of water. Whc. hoated, it . mnlts , ite water of tfpyrtalltatlo ', andoW cnithtèd heatlng thla is expelled lc.iv 12 a drv novrder, bflowu in pharmav ns 4Zme iwte. or bdittt alumuíhatsoldattUedrugstoisotteu .la'oed for-an lumf ov more Ln ft bot keoven bcfore uw. Ac:'ord "f. H C. Iïernbcck the best test tor ! . ' 'oiftcomrne.-ce ■ oontah op healkali Ijeing nmmoma. LH pwiwo „elledatthe samo ma.', leavlugouiy sulpliftte oí" alumina betund-p tor QwjlSL1M__ ítalo Campaninl in hs fotíng lays wè -e tuld tliat ftnior ti:.y.im!( t he ! bi, , usn it Uv and woiked at lus tnde "; Ehomoly, batida boatmiul voicc I