460 
GEOLOGY OF OHIO. 
Sesquioxide of iron ............ AUIS SSiG ale caaltiatoe naee em A LEER SR EeoH sad Sole 69.70 
SUG: .i50d cs seisrs coses ciseeeatle see vaceds woutduaus cusaseemuanomneasenmasee oes mememeteeceeeureate 16.58 
FEW LPN OTUO IE: MAAN ReR Ae KER ARAL nts (ney eRe enue nano Or aahB aN dod oc ago icbids 5.20 
Phosphoric AC ys casos es seosce st wcccses sh encusaloneedh oesotoueaoe eo emia reeteeen es 0.50 
Metalliccaromn icc... tescssgsdaiscsevdcsne duvaesmetooen tee eaeaeeet ashe meer mean eeemt tens 48.79 
Phosphorus..... INAS Oe, Gs LSC ik Cat nt Oe mae Pee 0.22 
Lorp, Chemist. — 
The blackband ores mined with the coal at Mineral Ridge con- 
tain enough bituminous matter to burn alone, and are roasted in heaps 
at the mines. The following is Prof. Wormley’s analysis of unroasted 
ore from Mineral Ridge: 
Volatile matter: 2555 i. ies rset ee eet tease eee Soe cen cae ReE 30.50 
SiliClOUs Matter iat owad.os Susacaecawsoeseees Meera ceaalonon oe teoee keene see ee eaaenes 11.84 
Carbonate of irony. ecehse checmeees socenecceeneee Sees sald deastaseabuiecion Ss 43.26 
OxIdE Of TON c.lco dos tacien Bede tate ce ee ee soca watts Caeciars oat Nearer ace es 8.94 
INIOVGTUTNE, ccoccs0c00000 ih ewes unncae sobienelesceleats csineceteeocconie eomeeeemeee me amacem aces Trace. 
Oxide Manganese ets )..o sweetie eteecelesens ewes ad se oleciele cewas enema cteesette eis ges 1.00 
Phosphate vol Mime... 85. aes arse tos wcnccincdes oSaclenete ececonaees umm omientaacias Trace. 
Carbonate of lime siiecds este ee ic aide oe casas s Soar ene erect ence eee 1.87 
Carbonate of. Magnesiayesitinttesesscst ct teeta nescse coool ice eares 2.03 
Sulphur co icdive sc cscacestsecaheveadweants cas tienes seweusconcelscomeeemece sesame sea uecne 0.18 
The extremely small amount of phosphorus in this sample is ex- 
ceptional. This ore after being roasted would contain about as 
follows: 
SeCSQUIOXIGE OL IFOM w.ieveceecdeecees “cecccoeceteseccsen ces Gu deesasc os Saveenenaconie 72.0 
SUiCIOUS MALLET .oo.0. elec. {6583 eectcvasccusen ot eauteta secenoseonemen cemeronncosenaet 24.0 
Oxide manganese ...... 
PIM Ora nedesecscecss sence ssae acts sledeaneoiisiones gees cr sea maaceerecee cermaeem semana 4.0 
Magnesia ...s..essceceres 
Totaliicass eiovsunescaccocdcc<sniacesccwececs ioecemscnic castenccccsttretea satan 100.0 
Metallic iron icecsec8 secsnctevesads oaccenceseaes oct ootescommeectoereeduasmeneaeanees 54.4 
This 
is about the per cent. of iron claimed by the sellers. This ore 
brought during the census year from $5.25 to $5.50 at the furnaces. It is 
used in mixtures, to give a very soft and tough foundry iron, being 
used with Lake Superior hematites or New York magnetites. As 
already stated, this is especially advertised as ‘ American Scotch Pig.’ 
