+---------+---------+---------
Total. | 81.12 | 82.37 | 79.18
+---------+---------+---------
Calculated: | | |
Ferric oxide (Fe_{2}O_{3}). | ... | 71.23 | 74.54
Magnetic oxide (Fe_{3}O_{4}).| 62.72 | 11.14 | 4.64
Ferrous oxide (FeO). | 18.40 | |
+---------+---------+---------
Total. | 81.12 | 82.37 | 79.18
+---------+---------+---------
Percentage of total
oxygen reduced. | 16.44 | 1.49 | 0.42
Metallic iron. | 59.73 | 57.93 | 55.54
-----------------------------+---------+---------+---------

NOTE.--The carbon monoxide (CO) had failed to remove from the ore the
carbon dioxide existing as calcic carbonate. The summary of experiments
in the following table appears to show that the water gas is a more
powerful reducing agent than CO in proportion to the ratio of as

4.21 x 100
4.21 : 6.72, or ------------ = 52 per cent.
72

Mr. B.D. Healey, Assoc. M. Inst. C.E., and the author are just now
constructing large experimental plant in which water gas will be used as
the reducing agent. This plant would have been at work before this but
for some defects in the valvular arrangements, which will be entirely
removed in the new modifications of the plant.