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Brewers' Hall at the Centennial

Valveless Engines at the Centennial

The Pennsylvania Diamond Drill Company's Drill

Aniline Colors at the Exhibition

By Carl Rumpff

The Philadelphia Exhibition

The Government Building

United States Naval Machinery at the Exhibition

The International Exhibition of 1876

Testing and Weighing Machinery of Messrs Riehle Bros

American Silverware at the Centennial

The Norwalk Steam-Engine

The Niagara Duplex Air-Pump

American Iron Bridges

Physical Society.—London, May 27

By Gladstone

French Academy of Sciences

Miniature Maps

The Importance of a Knowledge of the Laws of Health

To Westminster Hospital,and Lecturer on Medical Jurisp Rudence

By Thomas Bond

Dwellings for Workmen

Recent Trials of a New 38-Ton Gun in England

A Singular Accident

The “Challenger” Expedition

Pumping-Engine at the Lehigh Zinc-Works, Friedensville, Pa

Effect of Electricity on Particles Suspended in Liquids

The Loan Collection of Scientific Apparatus

Lessons in Mechanical Drawing

By MacCord

A New Domestic Ice Machine

How to Build Cheap Boats

By Paddlefast

Headaches from Eye-Strain

By S. Weir Mitchell

The Ophthalmoscope

Temperature of the Interior of the Earth

A New Wheat Destroyer

Water-Cress in the Materia Medica

Potatoes—Level Culture

Ploughing in Rye

House Drainage

By James R. Willett

Grease Traps

Cost of a Bushel of Meal

A New Microscopic Slide

Communicated by Professor Rupert Jones, F.R.S. Read before the Royal Microscopical Society, 1876

By M. Ernest Vanden Broeck

Huge Meteorites from Greenland

Newly-Discovered Antiquities

Precious Stones in Brazil

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    August 05, 1876

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