The Senate Committee's Report on the “Titanic”, The House Naval Appropriation Bill and more

Radiographic Study of the Effect of Exercise on the Heart, Exercising in Bed, Ripening Dates Artificially and more

The Great Tower Telescope of the Mt. Wilson Solar Observatory

A Description of the World' s Largest Reflector

Crop Improvement: A Problem in Increasing Our National Efficiency

Panama-Personal Impressions of the Work-II

The Gigantic Slides in the Culebra Cut

Wilbur Wright

The Passing of a Great Inventor

The Laboratory

Some Suggestions for Home Experiment

A Thermo Magnetic Motor and Generator, Reproducing Engravings without Light

What Inventors are Doing

Simple Patent Law : Patent Office News; Inventions New and Interesting

How to Remove Lead Sulphate from Lead Plates, Bifunctional Formation of Storage Battery Plates and more

What is the Principle of Relativity?

The Spectrum of the Aurora, A Forest Service Circular on Gum Woods