880 GEOLOGY OF OHIO. 
ANALYSES OF MILL CINDERS FROM MARIETTA ROLLING MILL. 
Puddling fur- Heating fur- 
nace cinder. nace cinder. 
Silieic acid ys su Slee ee Ao eae waleerre tc ae ame 21.58 24.51 
TLOMVSCSO MLO RICO See eyes Sante moeeate cise serene 63.38 63.30 
Me tallichiron tice ceseec)ccinis'sorsicis eaiciesteoseiaeiesior 7.12 6.80 
ANIMA ID ain ee es Meee cnc Yee lesaialee hentai oys eye 0.30 0.35 
Man gamese ioe isn Wen ip Mie neti iy liee cuebieraterens at seat ciet Se Trace Trace 
A A 0X any All sg A la et Slate OU dl i es eases 2.10 2.50 
M@eriesian tas ee Ce ues Te Cte eee erershocra aucioe seme 1.50 1.40 
Sulphrrri ly: soos io Se Sane tle ane tey ala ee reteset aes 0.33 0.17 
Phosphoric acidy a ses Lele ee cten a saee eet 3.20 0.c3 
Motalse see Nose on Sue) Sei een weer aerate 99.51 99.89 
Metallicnron sos cnsocsc em ec eeere Moe ORO dos 51.42 51.10 
Phosphorus: teas eee calena a eas ete cei waste 1.40 36 
ANALYSES OF MILL CINDERS FROM COLUMBUS ROLLING MILL. 
Sa 
Puddling fur- Heating fur- 
nace cinder. nace cinder. 
Silicieuaeicles seep aie Dor areata ieee Os Pee ne eat a) apa 21.00 
TrOMMORIC Ge aco ae ey ee ee RISE pei e ene Dea ve aie be ar td 67.69 
INNO OVE, Boke cede pss aie SEN EIS ue 2S Dearest Amer ER 2.80 
Manganese) oo eee out ura oclatere eine ee easieke tes 0.50 
Lime iphosphateie-io2c- sock eco ace oeeieee 6.42 
GE ty: NG OY 05 Wye Ro LE aS en Se Se oes em eo ORR 1.05 
Mac resis! ce Se Nees oe ise oe ee cues Smavcue une 0.37 
ehON FOR RE ee ei Ge aN Boe GG Goas 0.17 
TOPE Sree oe ean ean sta SIT SS tee oes Loe pen 100.00 
MES Gali ir Ow heer pete ena cas oe as oe aoe a 52.81 
Phosphortig ee eee oan siete eis catsimisiols eriaateete eters | 1.28 
The foregoing analyses, instead of confirming the common traditional 
belief that cinders from the heating furnaces are worthless, show that, 
as compared with the cinders from the puddling furnaces, they are the 
purer and better of the two. The average phosphorus in the former is 
0338 per cent; while that in the latter is 1.07 per cent., or more than 
three times larger. There is also a trifle less sulphur in the heating 
cinder. There is in it a little more iron, and a little more silica. In re- 
gard to the latter element, it had generally been thought that inasmuch 
as the heating furnace has a sand bottom, the sand would be blended 
with the cinder and render it valueless. The analyses do not sustain 
such a conclusion. The average of the three analyses show only 0.98 
per cent. more silica in the cinder formed in the heating furnace. In 
one case the silica is even less than in the other. There existed an im- 
