-----------------------------+---------+---------+--------- | I. | II. | III. +---------+---------+--------- |per cent.|per cent.|per cent. Ferric oxide (Fe_{2}O_{3}). | 68.55 | 76.47 | 84.81 Ferrous oxide (FeO). | 16.20 | 9.50 | 1.50 +---------+---------+--------- Total. | 84.75 | 85.97 | 86.31 +---------+---------+--------- Calculated: | | | Ferric oxide (Fe_{2}O_{3}). | 32.55 | 55.36 | 81.47 Magnetic oxide (Fe_{3}O_{4}).| 52.20 | 30.61 | 4.84 Ferrous oxide (FeO). | | | +---------+---------+--------- Total. | 84.75 | 85.97 | 86.31 +---------+---------+--------- Percentage of total oxygen reduced. | 6.93 | 4.02 | 1.07 Metallic iron. | 60.59 | 60.92 | 60.54 -----------------------------+---------+---------+--------- _Second Experiment, Water Gas_.--The tube, A, was filled with small pieces of anthracite, and heated until all the volatile matter had been expelled. The tube, B, was then placed in tube, A, the joint being made with fireclay, and to prevent the steam from carrying small particles of solid carbon into ore in the upper tube, the anthracite was divided from the ore by means of a piece of fine wire gauze. The steam at a pressure of about 35 lb. to the square inch was passed through the anthracite. The tube, A, was heated to white heat, the tube, B, at its lower end to bright red, the top to cherry red. ------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+ Experiment. | 1st. | 2d. | 3d. | ------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+ Number. | I. | II. | III.| I. | II. | III.| IV. | I. | II. | III.| ------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+ Total Iron. |60.59|60.92|60.54|65.24|61.71|61.93|57.23|59.73|57.93|55.54| ------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+ Iron occurring as ------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+ 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|30.28|55.24|54.42 ------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+