Features
Mechanical Handling of Materials
Electrical and Chemical Effect of Ultra-violet Rays
The Hertz Effect
The German Antarctic Expedition
Its Personnel and Its Equipment
A Modern X-Ray Laboratory
The Interrupter or “BreaK “
The Past and Present Geographical Distribution of the Iron Industry of the United States, Protection of Underground Pipes from Electric Currents, and more
Fire and Burglar-Proof Safes.—I
Recent Advances in the Construction
A Bituminous Rock Quarry
Charles Darwin—III
The Modern Motor Car
Ten Years' Progress
Poisoning by Gas from Heaters, Wireless Receiver Trouble
The Maurice Farman Biplane
Scale Drawings of the Machine that Flew from Paris to the Puy de Dome
The Chemistry of Inks in Handwriting
Things the Expert Must Know
Notes on the Economics of Locomotive Operation
The Problems Presented by Increasing Size
