| TABLE OF CONTENTS. |
|---|
| | PAGE. |
| I. | ENGINEERING AND MECHANICS.—Improved Fifteen Ton TravelingCrane. Designed for service in the construction of PortAlfred Harbor. South Africa. 3 figures. | 4967 |
| Improved Steam Boiler. 1 figure. | 4968 |
| The Elevated Railways of New York. | 4968 |
| Some of the Developments of Mechanical Engineering during theLast Half Century. British Association Paper. By Sir FrederickBramwell. The steam engine.—Evaporative condenser.—Steamnavigation.—Marine governors.—Light engines and boilers.—ThePerkins system.—Ether engine.—Quicksilver engine.—Locomotiveengines.—Brakes.—Motors.—Transmission of power.—Compressedair locomotives.—Hydraulic transmission of power.—Electrictransmission of power.—The manufacture of iron and steel.—Bridges.—Machine tools.—The sewing machine.—Agriculturalmachinery.—Printing machinery. | 4968 |
| Amateur Mechanics: Metal turning, 29 figures. Rotary cutters,12 figures. Wood-working and lathe attachments, 9 figures. | 4971 |
| A New Method of Keeping Mechanical Drawings. | 4978 |
| Achard's Electric Brake for Railway Use. 2 figures. Plan andelevation. | 4974 |
| II. | ELECTRICITY, ETC.—Electricity. What it is and what may beexpected of it. By Jacob Reese. | 4974 |
| Electric Light Apparatus for Photographic Purposes. By A.J.Jarman. 2 figures. | 4976 |
| Desruelles's Electric Lighter. 1 figure. | 4976 |
| Solenoid Underground Wires in Philadelphia. | 4976 |
| Dr. Herz's Telephonic Systems. 2 figures. | 4976 |
| Decision of the Congress of Electricians on the Units ofElectric Measures. | 4977 |
| Secondary Batteries. By J. Rousse. | 4977 | ...
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