828 } GEOLOGY OF OHIO. 
8 
The ultimate composition of sample No. 2 was determined as follows: 
Carbon 
ninja. ew picain'e\<iclc's teeisiccciatele valeaccisencisce tees eae e as aoe mera 
Hydrogen osc ko Sond oo eee oe al gare Se ciara oe 1 ee a cs a 5.92 
Nitrogen sss so ore ae She sels Gnd tose tite cee SO ee Decne eee 1.54 
Sulphtin es Co Mes e eS ce aie aerate ow ayes ers en nis EE en 0.63 
Oxygen ..... Weidcldee Secs e A so ee ti oe ale cron ae eins a ere pate eines va Se eala amet 18.38 
ABD 02203 no nan nn = 2 = ne omen ower or woe n cmnn mone ss eeescere=sas--ecee 2.10 
The moisture (6.80 per cent.) is included in the above constituting 0.75 
hydrogen and 6.05 oxygen. : 
Passing from the head of Meeker Run northward, we find the original 
mine of W. B. Brooks, Esq. Here the Nelsonville scam presented the 
following structure : 
| FT. IN 
Shale. 
Coaleeeincn ba es eo at oclae swe Des o5, Bal ete pele veteran e ee Ste eet eee eee mR ue 
A129 (= ee ca VR IL Oe ae Oboe SOSaK We 3 
Coal. cae soled bien castes ia oe Homes wee tie Sew lcwre w See Se eee ate arene 4 
NS OE EE BGG ONO AO DOB RGD DOLOHO O0OG00 GOOGG6 GaGGRG SnomaL ageOBo SHaCaSS 5c 2 
Coal ee es kee hea mmemataeelere S wlasa Me wahe so dleleraetielbala ei eee Sere eee este 1 7 
It is sometimes a little thicker, the thickening taking place in the 
upper bench. 
The first analysis of any coal from the Hocking Valley proper, after the 
Geological Survey was inaugurated, was of a sample furnished by Mr. 
Brooks from this mine. It is here given because it attested the great 
excellence of the coal, and proved quite a stimulus to those of us who 
were engaged in the investigation of the Nelsonville seam: 
Specilicioravitye- aes seceee cece ince seeiee eee ein aenaien ee eetteeerer 1.259 
WW BGO Tees Se ee eR ale RA URIS my leg OLE LG ae ae 6.80 
Aishienty se SEE MAU avails area SNM EAE are ean IU CLA URL MRD Na Hered eateap rs OO ae a 2.46 
Volatileicombustiblevmatters. 22 shee ccc awe os ee ee eee ee eee eee 33 28 
MixGdsGarbOn csces oes Soest Lie oe OR Sa par eS 57.36 
Total 225 Sosy nee Baebes oe a a as ans eee 99.90 
SUF Ee ie Sop So5 25E6 660506 HOROG0 060000 600600 990000 5000 600056 5500 5000 0.74 
At a later date I visited the mine and obtained samples of the coal 
from the three different benches of the seam, which were analyzed by 
Prof. Wormley: 
No. 1, lower bench, 
No. 2, middle bench. 
No. 3, upper bench. 
