IRON MANUFACTURE, ATT 
iron which will run about 0.6 to 0.7 per cent. of phosphorus, or if only 
ores from the weathered outcrop be used and carefully selected, the 
average might run down to about 0.50 per cent. of phosphorus. 
If we assume the average yield of the ore at 40 per cent., or 23 tons 
of ore to 1 ton of iron, the average per cent. of phosphorus would be 
about 0.24. 
The yield of the ore is best shown by taking the running of a char- 
coal furnace using only native ore. A run of 12 weeks at such a fur- 
nace in Vinton county showed: 
INGE VCKOTORUSEG cece nc cu twgs ops cdecep ccosss seve eteccessesssssecies Maueden areas 4,792,410 lbs. 
TOMpIMaad enact accarssseedersdusccliscdoceosscstccccscecsce cus 895.09 tons of 2,266 lbs. 
This pig-iron contained on analysis 93 per cent. of metallic iron. 
Calculating the percentage yielded by this ore, we find 39.4 per cent. 
metallic iron in the ore. 
Figures taken from the charging books of a furnace near Ironton, 
using the native ores exclusively, show for three consecutive years the 
following amounts of ore used: 2.58, 2.57 and 2.75 tons of ore. These 
figures are rather higher than those above given, and show a lower 
percentage in the ore. 
The limestones used as fluxes in the Hocking Valley may be illus- 
trated by the following analyses, made in the University Laboratory at 
Columbus: 
1 2 3. 4 5 
Silicious)matten.:...0.0.:--->-- BOTGBOONCOCEECOCEEE 5.45 12.1 3.50 4.25 4.60 
Carbomatevoiglinteyss esse ce noose crease 56.30 86.9 | 79.01 | 94:19 | 80.40 
Carbonate of Magnesia ...........sceccecseeoee 32.40 0.8 16.85 1.29 13.80 
Oxides, ONT, AANGL PILETAIA cocce9.086000 olna0000 5.60 0.45 | 0.50 | 0.26 1.25 
To talpeenee ema un sas 99.75 | 100.25) 99.86 | 99.99 | 100.05. 
Lorp, Chemist. 
1. Maxville limestone, “top rock ’’—Average of three analyses on different 
samples, 
2. Maxville limestone, “ bottom vein.” 
3. Marion limestone, quarries of Marion Stone Co.—Average of three analyses 
on different samples. 
4. Columbus limestone—Average of eight analyses on different samples. 
5. Owen’s Quarry, Owen’s Station, Marion county. 
