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Features

The Steamship “George Washington”

Marine Engineering, Past, Present, Future

From Reciprocating Engine to Turbine

The Advantages of Rich Mixtures in Concrete Construction

By E. S. Larned

Aerial Propellers

Old and New Forms

By Sidney H. Hollands

The Hygroscopic Power of Core

Influence of Temperature on Radio-Active Transformations

Explosion Gas Turbine or Combustion Gas Turbine?

Diagram of Electric Wave—Lengths

The Simplification of Calculating Wave Lengths

By W. W. Massie

Some New French Toys

Exhibits at the Recent Lepine Exposition

A Simple Calculator

Radioactive Elements

Their Number and their Properties

By A. T. Cameron

Improved Health of the British Army in India

A $500 Prize for a Simple Explanation of the Fourth Dimension

Concrete Pier at Santa Monica, Cal

The Second Concrete Pier in the World

By C. B. Irvine

The Brotan Locomotive Boiler

A New Engine Without Copper Plates and Braces

Photographic Developing

An Account of two Modern Methods

Sands their Relation to Mortar and Concrete

Singing and Speaking Stones

Some Ancient and Modern Wonders

By Georg Rosenfeld

Drifting to the Pole

Moving Water and Animals

The Effect of Agitated or Moving Water

By Armand Billard

White Throats

A Study of a Common Bird

By M. J. Nicoll

Disinfectants

An Animal as an Engineering Structure

Some Factors of Safety Provided by Nature

By S. J. Meltzer

Trade Notes and Formulae

Engineering Notes

Departments

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    December 19, 1908

    Think Outside the Gift Box