FeO. |12.60| 7.39| 1.17|46.98|18.59| 4.03| 0.84|29.45| 2.69| 1.12 Fe_{2}O_{3} |47.99|53.33|59.37|18.26|43.12|57.90|56.39|3
0.28|55.24|54.42 ------------------+-----+-----+-----+-----+-----+-----+-----
+-----+-----+-----+

Per cent. of Oxides.                                                          |
------------------+-----+-----+-----+-----+-----+-----+-----

+-----+-----+-----+
FeO.            |16.20| 9.50| 1.50|60.40|23.90| 5.18| 1.08|37.86| 3.46| 1.44
Fe_{2}O_{3}.    |68.55|76.47|84.81|26.08|61.60|82.71|80.55|4

3.26|78.91|77.74
Total.          |84.75|85.97|86.31|86.48|85.50|87.89|81.63|8

1.12|82.37|79.18
------------------+-----+-----+-----+-----+-----+-----+-----

+-----+-----+-----+

Oxygen in Ore.
------------------+-----+-----+-----+-----+-----+-----+-----

+-----+-----+-----+
Before experiment.|25.97|26.10|26.05|27.96|26.45|26.54|24.52

|25.60|24.81|23.80
After experiment. |24.16|25.05|25.77|21.24|23.79|25.96|24.40

|21.39|24.44|23.64
Difference.     | 1.81| 1.05| 0.28| 6.72| 2.66| 0.58| 0.12| 4.21| 0.37| 0.16
------------------+-----+-----+-----+-----+-----+-----+-----

+-----+-----+-----+

Per cent. of oxygen reduced.
------------------+-----+-----+-----+-----+-----+-----+-----

+-----+-----+-----+
oxygen reduced. | 6.93| 4.02| 1.07|24.03|10.02| 2.18| 0.49|16.44| 1.49| 0.42
------------------+-----+-----+-----+-----+-----+-----+-----

+-----+-----+-----+

Degree of Oxidation of the Ore after the Experiment.
------------------+-----+-----+-----+-----+-----+-----+-----

+-----+-----+-----+
FeO.              | ... | ... | ... |84.66| ... | ... | ... |18.40| ... | ... |
Fe_{3}O_{4}.      |52.20|30.61| 4.84|37.82|77.01|28.12| 3.88|62.72|11.14| 4.64|
Fe_{2}O_{3}.      |32.55|55.36|81.47| ... | 8.49|59.77|77.75| ... |71.23|74.54|
Total.            |84.75|85.97|85.97|85.97|85.97|85.97|85.97

|85.97|85.97|85.97|
------------------+-----+-----+-----+-----+-----+-----+-----

+-----+-----+-----+

------------------+-----------------+------------------

-----+-----------------+
The ore having    |                 |                       |                 |
been exposed to   |     Steam.      |     Water gas.        | Carbon monoxide.|
------------------+-----------------+-----------------------

+-----------------+

Four Samples were Tested.—­I.  The bottom layer, 11/4 in. thick; the color of ore quite black, with small particles of reduced spongy metallic iron.  II.  Layer above I., 41/4 in. thick; the color was also black, but showed a little purple tint.  III.  Layer above II., 5 in. thick; purple red color.  IV.  Layer above III., ore a red color.  The analyses gave: