462 GEOLOGY OF OHIO. 
To illustrate the working of these fuels with Lake ore, the follow- 
ing summary of a week’s run of a large furnace using Lake ore and 
making Bessemer pig-iron, may be of value: 
CHARGES. 
Tons, 2,000 lbs. 
Oren teense. isislbiva views erscislauedeaaees sae ee eee eee eee Pace Conds 680.78 
StClySCal yes cssacs sacs hse sc veoececeeeeheus chee eee ee 18.12 
Te IMA CSEOME ies ccc anee locciciey Sacelee can sed consent eran Ge CeCe CC nee 232.71 
WOK Or .csaeee Soh deed oc be aaa ee EE 430.50 
Coal ii, rcaee seed dade ja Sos eauase Mee heat eee 172.02 
JEROIN FOROCINESE! ccoosaonaconscc00 06000006 wa dlewipose tiene ssitellsnos cuties oma reecu rane asece 448.93 
The furnace had not been in blast very long. The iron produced 
was No. 1 foundry, for use in the converter in making steel. 
A furnace company using native ore and coke has kindly allowed 
the following figures to be taken from their charging books: 
Srx Days’ Run or Furnace. —NumpBer Caarces, 554. 
Tons, 2,000 lbs. 
Lake:ore andjcind eri: <cccccedesesoicne os isn nels ee nee 286.69 
‘Wampum ones haa) 5. Sa eee ene re ROE i eames cers rodent aduearase 286.69 
LAIN OSEON Cisse sb sdedscettcecnoaementecetee ec ese Ge cows devine eee eee ee eee 291.91 
(O16): sen Rn a eRe On nN een SAM eras ier tlt ciao Gisticad obo poa naeaods 515.77 
TPOWMSIMAG Ors. soseu nw acslenseaweco nedeeecealee tra ciic bos siden c se oe os ae eee tne ce mnareenc eee 284. 
Again as still another example, the following charge may be taken, 
representing also a week’s run : 
Tons, 2,000 lbs. 
DAK CHOLES vais ccpesases'ssie'e dena vesestiiessccinas cote mooswerecs oosesesmeron ene coeens tea 428.23 
EAA CRLOTIS sssc tal Sesinssccorsioe sh Poet se ceeieles sede coesactne deulcoc comes Rec erecoenine eee 180.60 
COA] eicnnncctedicns eee sencsdwaasccweesens acess cassssene se semnocseweneeescinesenceeetmaeetess 77.40 
(O70) 5s RP Re EEE ee enn eng SRnricoR on ede Echoae, Sonus se codespaacodcurn 338.49 
Wo) oka ont Ke (ie cn PRR enn aan OBO ECT ara srinin detnccosoauacaieaoroobeescs 254.3 
These figures may be taken as fairly representing the working of 
the furnaces of the region. The pure Lake ores enable them to use 
low amounts of coke to the ton of iron, as the amount of fuel required 
is rapidly augmented when the sterile material in the ore ir reases. 
This fact often not considered is the explanation of the large amvunts of 
fuel usec in regions of the State smelting low grade ores. 
The Mahoning Valley district, including Cleveland, is at present 
the principal iron producing region of the State, its total product far 
exceeding that of the other districts. The establishments are large and 
