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Soap Bubbles and Films

Studies of the Black and Colored Spots in the Film Reveal its Structure

By J. Perrin

Experimental Wireless Telegraphy and Telephony—II

Aerials, Loops, Underground and Submarine Antennae, Tree Antennae and Other Arrangements

By Louis Gerard Pacent and Austin C. Lescarboura

“cupping” vs. “boxing”

By Chas H. Herty

How Leather is Prepared from Hides

A Brief Account of the Treatment that Furnishes Leather for Our Shoes

Recent Researches on Cholera—II

How the Modern Physician Solved the Problem of Reducing Deaths from this Dread Disease

By Leonard Rogers

Sorghum

A Plant of Value as a Source of Food and Industrial Raw Material

The Color of Water—IV

A Valuable Compendium of the Literature on a Neglected Subject

By Wilder D. Bancroft

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    July 26, 1919

    Think Outside the Gift Box