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New Gas Engine

On a New Method of Balancing the Engines used in Winding from the Deep Shafts of Westphalia

By W. Fairley

Improved Emery Grinder

A Chapter on Compacted Beams

By Thomas Morris

Miscellaneous Notes

Locomotive Economies

Improved Radial Axle-Boxes

By H. W. Widmark

Mining Notes

New Hand-Power Rock Drill

Heavy Mining Machinery

The U. S. Mint, Philadelphia, Pa

The New Yacht Intrepid

Source of Water in the Mines

How to Build a Cheap Catamaran

The New Brazilian Iron Clad “Independencia”

Monument with Wrought-Iron Inclosure

The Technology of the Paper Trade

By William Arnot

Optical Properties of Glass

Petroleum Oil Gas for Lighting Passenger Cars

The Bitumen of Judea Process

The Society of Telegraph Engineers

New Form of Telephone

Electrical and Telephonic Experiments

Improved Telegraph Inker

How to Secure Good Health

Color in Polarized Light

Medical Notes

Microscopical Adjunct

The “Lord of Snakes”

The Hot Water Treatment

By Frank H. Hamilton

Action of the Copper-Zinc Couple on Alkaline Oxy-Salts

By Gladstone and Tribe

Manchester Literary and Philosophical Society

New Method for the Determination of Boiling-Points

By H. C. Jones

Chess in New York

Huddersfield College Magazine Tourney

Philidor's Blindfold Games

Scientific American Chess Record

François Andre Danican Philidor

Solutions to Problems

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