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Incandescent Mantles

By Vivian B. Lewes

The Launch of the “Kaiser Wilhelm Der Grosse”

Rules for Conducting Boiler Trials

A Large Centrifugal Pump

A Novel Vise

New York Street Widenings and Extensions

By N. J. Vander Weyde

Trade Suggestions from United States Consuls

Miscellaneous Notes

Selected Formulæ

Miscellaneous Notes and Receipts

Provisioning an Atlantic Liner

The Preservation of the Dune of Helgoland

Odd Things about Crabs

The Number of Animals

Persian Tigers

Functional Resemblances between Animals and Plants

By Alice Dinsmork

Winged Carriers of Disease

Sugar of Milk

American Trade in British Eyes

The Wear of Modern Guns

The Tinplate Trust

The Ruins of Xkichmook, Yucatan


Electricity as an Exact Science

By Howard B. Little

The Electric Arc

Selenipedium Macrochilum Giganteum Grande

Vibrations of the Ether

The Proposed Magnetic Survey of the United States


The Effect of Ozone on Photographic Plates

By E. Andreoli


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    July 29, 1899

    20% Sitewide for President's Day