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The Paris Exhibition—Hotchkiss Ordnance

Coaling of War Ships

The 2,000 Ton Cruisers

High Speed on Meridional Railways

The New Port of Calais

The American Paper Bag Machine at the Paris Exhibition

Decomposition of Stones

By G. W. Hawes

On the Cause of the Accumulation of “Black Paste” in Steam Chests and Cylinders

By J. E. Denton

Instruments for Drawing Curves

By C. W. MacCord

Structural Strength of Sea-Going Torpedo Boat No. 1

Edison's New Phonograph

Gaston Plante

William Tempel

By G. V. Schiaparelli

New Electric Launch

Electrical Smelting and Production of Aluminum

By William Boby

On Allotropic Forms of Silver

By M. Carey Lea

Process for Hardening Plaster of Paris

The Wagon Wheel Question

The Mysterious Ball

The Wave Length of Light as a Practicable and a Feasible Standard of Length

By A. A. Michaelson and E. W. Morley

The x+y Problem

The Squirrel Question


Prevention of Consumption

Notes on the Production of Maple Sugar

Building Plans and Specifications

Composition of a Brick from the Brick Yard of S. P. Crafts, at Quinnipiac, Three Miles North of New Haven, Conn

By O. H. Drake

The Voltaic Current obtained with Bismuth in a Magnetic Field


  • Departments

    Patents- July 13, 1889

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