โ Scribed by Kesava-Menon, A.
No coin nor oath required. For personal study only.
during n pcriod of 60 ycnra or mom for tho cxtrnction of silvcr froin cop cr mattes. Augustin, tho mnnn cr of ono of tlio BInnsfcd' ior~cs sonic GO Scars ago founf tlint by wnshing finely crushed copper innttcs contniniii silrcr, with sodium chloridc, silvcr cliloriclc wns formot nliicli could be dissolvcd nnd lcnclicd out by strong hot brinc ; tho lint solution containing the silver cliloriclu in solution was t hcnnllo~vcd to flow t,lirougli suitnblo tnnlts or tubs contnining nictnllic copper on wliicli tlic silvcr nwi prccipitntctl in thc form of cement silver. Lnter, Zicrvogel, tlic nianngcr of the copper works nt i\Innsfcld, discovered t h t wlicn firicly crushed nrgcntifcrous copper innttc is wnslictl with great cnrc niid with n cnrcful control of tlic tcnipcrnturo of tho furnncc, tlie silver could bc conwrtcd into silver sulphnto wliicli niny be lcnolicd out nit,h hot. wntcr, nnd the silvcr prccipitntctl on copper ns in tho Augustiii incthod. The succession of renctioils which tnltes plncc in thc operntion of wtsliing is of tlic most intcrestirig ant1 clclicntc chnrnotcr, nnd to illustrnlc tlic mngnitudc of tho opcrutions conducted at Argo in Colorndo, wlicrc I introduced tho incthod in 1S73, I find among my notes tlic folloiring figures :-Silver cstrtrctcd from coppcr mnttc from 1873 to 100G, 55,903,022 oz. fitic silver rc1rrcscnting R wci h t of 101743 tons (of 2000 Ib.) \vVhiclv rcprcscnts a p r o h c t of 2770 tons of silvcr sulplintc. Hcrc ivc linrc nn cramplc of dry nntl wct incthods combinrd. cncli tlcpcnding for its success on tlin ilclicntc cl~ciiiicnl clinngcs involved in tho opcrntion. nfr. CInutIct docs not rcicr in his p p c r t o tho immense ndvcntnges which tlic prncticnl nictnllurgist lins cspcricncctl during tlic Inst. few ycnrs in 1110 dorelopmcnt of quick ns \vcll as rclinblo niatliotle in the nssny of orcs nnd mctnls. If \vc conipnre tlic 0111
๐ SIMILAR VOLUMES
Some time ago you issucd ti wnruiiig rcgtirdiiig one' or t,wo scnftiring individunls who were goiiig about the coi1nt.y selling Persian rugs. They p i n access to lnborntoiies riiitl institiit ions l y suying t.lint t.licy lind sccn Professor So-niitl-so wlio Iiiid told tlicni to call on yon. They t
Mit einem Alkoholmolekul stehen nicht einzelne Wasser-Abschinnungseffekte des Wasserstoffatoms (Abschinn. SOH) und der nichtxylgruppen der analysierten Alkohole bifllieden Elektronenpaare des Sauerstofit0m.s (Abschinn. S,J in Hydro-det worden. lassen sich mit fokendem deuten\* . -.. molekiile, sonde