| 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 |
| [ Messrs. Kapp and Crompton's Measuring Instruments. 5 figures.] | 8116 |
| IV. | [GEOLOGY, ETC.—Permeability of Sand Rock.—By F.H. Newell.] | 8103 |
| [ The Grotto of Gargas, in the Pyrenees.—Paleontological remains found therein. 2 engravings.] | 8103 |
| [ Remarkable Wells and Caverns in Yucatan.—By Alice D. Le Plongeon.] | 8105 |
| V. | [NATURAL HISTORY.—The Cabbage Butterfly and the Peacock Butterfly.] | 8105 |
| VI. | [BOTANY AND HORTICULTURE.—The Bhotan Cypress (Cupressus torulosa).—With engraving.] | 8106 |
| [ The Pitcher Plant.] | 8106 |
| [ What is a Plant?] | 8106 |
| [ Camellias.—Culture of the same.] | 8106 |
| [ Arisæma Fimbriatum.—Leaf, spathe, and floral details.—With engraving.] | 8107 |
| VII. | [MISCELLANEOUS.—Striking a Light with Bamboo.] | 8107 |
| [ Experiments in Memory.] | 8107 |
