Volume 41, Issue 1050supp
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Features
Classic Architecture
From the Point of View of an Architect. A Discourse before Johns Hopkins University, at Baltimore, MD
The Metol and Amidol Developer
Retouching and Spotting Negatives
The Gobelins Tapestry Manufacture
Penetration of the Lee-Metford Rifle
Electronite
The Arc Light
Influence of Crater in Efficiency of Lighting
The Electric Dancing Puppets
The Singing Electric Bell
The Electrolytic Action of Return Currents in Electrical Tramways
Magnetic Tester for Sheet Iron
New Triple Expansion Pumping Engines
Engineering Notes
Electrical Notes
Miscellaneous Notes
The Science of Social Statistics Population
Original Memoir of Prof. Roentgen
On a New Kind of Rays