| TABLE OF CONTENTS. |
|---|
| I. | CHEMISTRY AND METALLURGY.—Gallisin, anUnfermentable Substance in Starch Sugar. |
| The Combining Weights, Volumes, and SpecificGravities of Elements and Compounds. |
| Analysis of Zinc Ash and Calcined Pyrites by Meansof Ammonium Carbonate. |
| II. | ENGINEERING AND MECHANICS.—Petroleum as aFuel in Locomotive Engines.—By THOMAS URQUHART.—Sprayinjector.—Driving locomotives.—Storage ofpetroleum. |
| Improved Gas Light Buoy.—2 figures. |
| Project for a Roadstead at Havre.—With mapand views of different breakwaters. |
| Improved Catch Basin.—2 figures. |
| Water Power with High Pressures and Wrought IronWater Pipe.—By HAMILTON SMITH, JR.—Methods ofconducting water and transmitting power.—Texas Creek pipe andaqueduct.—4 figures. |
| Parachute Hydraulic Motor. |
| Improved Shafting Lathe.—1 figure. |
| Power Straightening Machine.—1figure. |
| Hydraulic Mining in California.—By GEO.O'BRIEN. |
| III. | TECHNOLOGY.—Emerald Green: Its Propertiesand Manufacture.—Use in wall paper.—ROBERTGALLOWAY. |
| Charcoal Kilns.—Extra yield.—2figures. |
| IV. | ARCHITECTURE—Entrance, Tiddington House,Oxon.—An engraving. |
| V. | ELECTRICITY, LIGHT, HEAT. ETC.—TheTemperature of the Earth as shown by Deep Mines. |
| New Arrangement of the Bichromate of PotashPile.—3 figures. |
| The Distribution of Electricity byInduction.—1 figure. |
| Electricity Applied to the study of SeismicMovements.—Apparatus for the study of horizontal and verticalseismic movements, etc.—8 figures. |
| New Accumulators.—3 figures. |
| Industrial Model of the Reynier ZincAccumulator. |
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