| TABLE OF CONTENTS. |
|---|
| | PAGE. |
| I. | CHEMISTRY AND METALLURGY.—The Cowles Electric Smelting Process. 5 figures. | 8113 |
| On the Electrical Furnace and the Reduction of the Oxides of Boron, Silicon, Aluminum, and other Metals by Carbon.—By Eugene H. Cowles, Alfred H. Cowles, and Charles F. Mabery. | 8112 |
| Chemical Action of Light. | 8117 |
| Eutexia.—Cryohydrates.—Eutectic salt alloys and metal alloys. | 8117 |
| Chinoline. | 8118 |
| Method of Rapid Estimation of Urea. 1 figure. | 8118 |
| Assay of Earthenware Glaze. | 8112 |
| II. | ENGINEERING AND MECHANICS.—Deep Shafts and Deep Mining. | 8104 |
| Sinking of the Quievrechain Working Shaft.—Numerous figures. | 8108 |
| On the Elementary Principles of the Gas Engine.—An interesting paper read before the Gas Institute by Mr. Denny Lane, of Cork, and discussion following. | 8109 |
| M. Meizel's Reciprocating Exhauster. | 8112 |
| Automatic Siphon for Irrigation. 1 figure. | 8113 |
| III. | ELECTRICITY, TELEGRAPHY, ETC.—Optical Telegraphy.— Cryptography.—Preservation of Telegrams.—The projector in optical telegraphy.—Use of balloons. 4 figures. | 8114 |
| A New Style of Submarine Telegraph. 4 figures. | 8115 |
| A New Circuit Cutter. 2 figures. | 8115 |
| New Micro Telephonic Apparatus. 5 figures. | 8116 |
| ...
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