The Walnut Lane, Philadelphia, Bridge
A Majestic Concrete Structure
Volume 66, Issue 1715supp
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Features
Effect of Motors on Macadam Roads
How Cars Ought to be Designed to Preserve Roads
Electric Furnaces in Germany
What it Cost to Reduce ores Electricity
Blau Gas, a New Gas for Illuminating, Heating, and Power Purposes
The lift and drift of arched surfaces
How they Behave in a Uniform Current of Air
The burglar and the safe maker
An Electrical Guard of Simple Construction
The Lentz Axial Governor
Morden Ordance
Some Wonderful Weapons Exhibited at the Franco-British Exhibition
Battles in he Sky
The Military Utility of the airship
Coal-Washing Jigs
Some Further Improvements
The Ringed and Smooth Snakes
The Markings of Two Harmless Snakes