, 1881-09-10
1,,t,ils Of Number Of Mines and
Product Of Coal in Each Of
the Counties.
pro1,ablIity that tho Lower I" Coal
MEASURES" Extcnd into tho
southwestern Counties.
,oo,anatn Product of Iowa and Northern
" illinois In the Year to 1uno, 1881,
About 100000 Tons,
Representing a. Years Labor for Over
10000 Men, and an Aggregate
Value at the Mines of
Nearly $1O,0o0,000.

SHA"" 49,
Nenrlv $4,000. 900.
,h. t.i.o,, T-,,uu,. ,stt,, s,o,t,tir, t.om.
t""1;ai s;iiI jtun, nhciSi an,t Authentic Suttrrrt.i
III iowa TINT grot,f' or Seffes VI .stfasa
esle.| by tho ecoloKssts "tlso coal measures "
tsp1ubably frum 100 to 5ol feet III thickness,
measuring vertically. lilt tue general posi-
tma Of fhts formation Is not cSactlY horlzoll-
GI. Tllcrc Is Il Fehefal lhclihntloll aowl-
ward, Or "dlp," from cacil toward the west
MD sa'thwcst wl'scH woa'tt prooao'y aver
asc IRON Two to four fect to tio i''ie. 'lheso
sre, uf course. 1nally r'aecs WHERE Ill llihitca
districts tho tllt !li''y seem 70 10 hofazohlai.
orpyrn toward tie cAst, DIT tfio Eehcfnt Ie1'l-
ency Of NIL tic coa!.Dearlilg aa well us
other formations is 10 up TO tho Southwest
Tus convenience uf description tic gcoloststs
hare divided Ills aoo or GU 1eet 'ol "co;!t
measures" into three Kroaps-siz.: tho
"upper," "mlddse," ano "lo"cr coal meas"
urs." Euclt of these groups embraces Z.
great 'ha'iy strata u various for''atsnns. OF
rocks that aro hsuttttu nssocinteu Will tho
beds or seams OF eonl. In somo places tllo
"cdai measure" Is barren OF any seam df
toal Ut sufficient thickness to be worked
pEoaab!y, b,'t ns general rttlo eacli OF those
groaps Ut cuul measures carries n sen'l or
6ed Of coal tint Ii a'te OF tho cliEef clhractcr-
ttlcs of tt1at coal measure wherever 1t may
exlst.
THE "1owEn" coal. MEASURE
Is The one which III Iowa is HOW producing
tbe great bulk Of tho conl raised III the Stnte.
The gcneral thickness OF this lower coal
neasure Is probably l5o feot, mud 1t has been
iound III nl..Ily places TO carry three seams Of
eual, these seams Of coal btlng ut various
distances averaging FROM thirty tn fifty feet.
tpaEt. Tho nTeraye oggrogato thickness of
Tho seams Is probably twelve fuct, Tho
"midtlp" coal ,neusure Nlso carries three (or
fous) spaills Of coal but they are ull thin, va
RING from slxtecli to twontv.four in Giles,
aud It Is on!y whel, they Gun NIL be To ulld In
such c1osu proximity HI tO be worked rs o,,r
eanl lint tl.oy nrU profitable. Tho "upper"
ecal ,ne;.sura carries M fnr rs yet Known
oa'y os,o seltiti Of eoai from sixteen to t,vui-
sy.folr INCHES thick. rhcsv three coal u,eas-
utes tfo overlapping each othor Hike shingles
una roof, the lower olte projecting from iifty
sosayenty-ilye miles uortheastwnrtl past tho
edge Of tho middle one, ard tic middle one
projecting noril,uas.wart ri, nyerage OF say
fifteen mIles beyond tho edge Of tho nppur
ons. Tho eastern, or outcropptng ctlgn Of
this rppur COIL nleasure nIny be approXi-
matey truced by Il ifno drawn from Centre
slo In tie southwestern part Ut lllo Stntc,
nprthwestwnrt through Charlton, Guthrie
Centre, and Audubon. The eastern
or outcroppil3g edge Of tie middle
coal measure may be approximately
traced By llue drawn from the southeast
corner OF Appannose County to tho City OF
Des Moines, thence twelve miles further
northwest, ,4sld thence twenty-five miles to
tho wcst
THE EASTERN OF, otrcnorp1Su EDGE or
THE LOWER COAL MEASURE
may bo hpprox1niate1ytraced by II iftlo drawn
from ule City Df Fort Dollge to Eltlara,
thence southward to tho cet,tre Of tie north
lino OF Jasper County, thnnce saNthcastward
toa po!nt three or fuur miles west OF WASH
lnsto!s, III Washington County, md thence
south to thc south boundary Of thp State.
The northwestern boundary Ut this coal
held has never been determined, but It may
be approximately lntllcatod by ltne drawn
isoln Fort Dodgo through Audubon tO
C!aslndn III l'ago County,.
Int besides this area there Is M antlle In
ecost County, 1N miles eust OF tho eastern
limit of The ilell us above described.
III tic article on the IliuoIs coa!.tlolt,
printed lit f'nr TH1l,uSE u week ogo, Il was
mentioned tint thIs tepos!t OF CoD( In Scott
County lid not pro.,orly belong to the Iowa
eaaldeld. this ,iIentton wus muda be-
eause III MI tho Intermediate 100 miles h.
twrcn tha 1o,, III, ~ i'tIs., .'.'t ~.
Rcn,t f.a,,,,., Nv" .eu 70 uese1iou.'' i.slu wv
ronss ouuass o h,,hes' INC sun-catpoMlefo"s
theFv e,,uot ,,a uny detrosit uf tha cnai
measures IN ,.,,,,,ort ,, sot,tt c,,,,t,, ,,,,''s
witt, ,I,a '.."i,'.,, wy ssu.s a"N'' 'i"s'