Science and the Cost of Living, Cold Light and more

A Hydraulic Variable Speed Gear

A Power Transmission Mechanism Consisting of a Pump and Engine Couple

Dussaud's "Cold Light"

Its Remarkable Applications

Plans for the Disposal of New York's Sewage

A Treatment Plant on an Artificial Island Three Miles Offshore

Recent Assaults Upon the Patent System: What they Mean to Manufacturers, The Current Supplement

The Brazilian Battleship "Rio de Janeiro", Cork Paper and its Uses

A New Parseval Airship, The Good Roads Movement and more

Mending a Broken Steel Tape

Hint for Boring a Straight Hole

A Toolholder for Grindstones

How to Measure Closely with Ordinary Calipers

Two Drilling Kinks

Rig for a Two-handed Saw

Device for Holding Screws when Filing them Shorter

Jig for Turning up Rough-threaded Bolts

An Automobile Field Kitchen, Tar Bonded Roads in Cincinnati

By Our Berlin Correspondent

Don, the "Talking" Dog, Naphthalin as a Binder for Anthracite Briquettes