A Criminal Sanatorium

The Influence of Brain-Power on History

Sir Norman Lockyer's Presidential Address to the British Association

Theories of Sleep

Production of Coke in 1902

Jenatzy Magnetic Clutch

Manufacture of Stamped Envelopes

Sun Dial with Electric Bells

“Dim Religious Light”

Mining and Manufacture of Rock-Salt

3. Steam Evaporation

Time-Saving in Working with Logarithms

The World's Occupations

The Vernaison Suspension Bridge

The Wireless Protocol

The Lebaudy Airship

The Ninth International Geological Congress

The Improved Longuemare Carbureter

The Paris Correspondent of the Scientific American

A New Projection Apparatus for Scientific Work

Electrical Notes

Engineering Notes

Trade Suggestions from United States Consuls

Selected Formulæ