| TABLE OF CONTENTS. |
|---|
| | PAGE. |
| I. | ENGINEERING AND MECHANICS.—Watchman's Detecter. | 5023 |
| Integrating Apparatus. | 5023 |
| A Canal Boat Propelled by Air. | 5023 |
| Head Linings of Passenger Cars. | 5023 |
| Improved Mortar Mixer. 2 figures. | 5023 |
| Practical Notes on Plumbing. By J.P. Davies. Figs. 37 to 53. Tinning iron pipes, copper or brass work, bits, etc.—Spirit brush.—Soldering iron to lead.— Dummies for pipe bending.—Bends and set-offs.— Bending with water.—Sand bending.—Bending with balls or bobbins.—Three-ball or lead driving ball and double ball bending.—Bending with windlass and brass ball.—Hydraulic or cup leather and ball bending.—Bending by splitting, or split made bends. —Pulling up bends.—Set-offs.—Bad bends.—Bad falls in bends.—Bends made into traps or retarders. —Bends made with the "snarling dummy." | 5024 |
| The Grossenhain Shuttle Driver. 1 figure. | 5025 |
| II. | ELECTRICITY, MAGNETISM, ETC.—The Electro-Magnetic Apparatus of Dr. Pacinotti. 8 figures. The Pacinotti electro-magnetic machine of 1860.—The Elias electro-motor of 1842. | 5015 |
| The Elias Electro-Motor. | 5016 |
| Bjerknes's Experiments. 7 figures. | 5016 |
| The Arc Electric Light. By Leo Daft. | 5018 |
| Hedges' Electric Lamps. 4 figures. | 5019 |
| Electric Railway Apparatus at the Paris Electrical Exhibition. 17 figures. Lartigue's switch controller, elevation and sections.—Position of commutators during the maneuver.—Pedal for sending warning to railway crossing, with elevation and end and plan views.—Electric Alarm.—Lartigue's bellows pedal, with plan and sections.—Brunot's Controller. —Guggemos' correspondence apparatus.—Annunciator apparatus.—Lartigue's controll ...
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