Announcement of Rules for the Gould-Scientific American $15,000 Prize, Lessons of the Zeppelin Airship Disaster, and more

Electricity- July 9, 1910

Engineering- July 9, 1910

Science- July 9, 1910

A Giant Steam Excavator

By Our English Correspondent

The Two Highest Masonry Bridges in the World

The Government's Money Laundry

The Wreck of the "Deutschland"

Rules Governing the Competition for the $15,000 Prize Offered, Wanted: Information about Dishonest Patent Schemes

A Colossal Illuminated Advertising Display

An Animated Scene in White and Colored Lights

Novel Electric Towing Locomotive for Canal Locks

An Improved Boomerang

Magic for Amateurs--I

Coin and Handkerchief Tricks

Electric-Lamp Heating and Cooking Devices

A Cheap Home-Made Roller

Carrying Water with the Help of a Hoop

Holder for Broken Saw Blades

A Convenient Drawing-Board

Easily Constructed Electric Toaster

The Current Supplement, Guiding Signals for Aeronauts