| TABLE OF CONTENTS. |
|---|
| I. | ENGINEERING, ETC.—Steel Structures.—Best use of different grades of steel.—From a paper by Mr. JAS. CHRISTIE. |
| Natural Gas Fuel and its Application to Manufacturing: Purposes.—Paper read before the Iron and Steel Institute by Mr. ANDREW CARNEGIE.—First use of the gas.—Wells near Pittsburg.—Extent of territory underlain with gas.—Cost of piping.—Analyses ofnatural gas. |
| A Gas Engine Water Supply Alarm.—1 figure. |
| The Water Supply of Ancient Roman Cities.—An address by Prof. W.H. CORFIELD.—Aqueducts for the supply of Borne.—The aqueduct bridge Pont du Gard.—The supply of Lyons.—Construction of underground aqueducts. |
| Steam Engine Economy.—By Chief Engineer J. LOWE, U.S.N.—With diagram. |
| The "Elastic Limit" in Metals.—Selection of wire for suspension bridges, etc. |
| Prices of Metals in 1874 and 1884.—With table. |
| II. | TECHNOLOGY.—A Method of Measuring the Absolute Sensitiveness of Photographic Dry Plates.—By Wm. H. PICKERING.—From the proceedings of the Academy of Arts and Sciences. |
| Soldering and Repairing Platinum Vessels in the Laboratory.—By J.W. PRATT. |
| The Helicoidal or Wire Stone Saw invented by M.P. GAY.—With engraving of quarry showing application of saw, and 5 figures. |
| Portable Prospecting Drill and Automatic Safety Gear shown at the Inventions Exhibition.—With 2 engravings. |
| III. | ELECTRICITY, ETC.—Electricity in Warfare.—By Lieutenant B.A. FISKE, U.S.N.—Electrical torpedoes.—Torpedo detecter.—Military telegraphy and telephony.—Electricity for firing great guns.—Arrangement of wires for lights.—The search light.—Incandescent lamps for sight signaling.—Electrical launches.—An "electric sight". |
| Meucci's Claims to the Telephone.—With description of his instrument and 10 figures. |
| An Electric Centrifugal Machine for Laboratories.—By ALEX. WATT.—From paper read before the British Association.—1 figure. |
| Transmission of Power by Electricity.—Experiments of M. MARCEL ...
Sitemize Üyelik ÜCRETSİZDİR! |
