Skip to main content

Features

A New Type of Great Lake Ore Steamer

By Day Allen Willey

The Greatest Altitudes Attained by Unmanned Sounding Balloons

By A. Wagner

Progress with the Electric Furnace

Signaling to Mars

By Edgar Lucien Larkin

Testing Gas Engines and Motors

Some Rules for Engineers

By E. S. Frash

The New Telefunken Telegraph

A Combination of the Arc and Sparfi Systems

By Count Arco

Bamboo in California

Building Bricks of Glass

A New Structural Material

Giant Leaves

Some Monstrosities in Foliage

By S. Leonard Bastin

The Form and Dimensions of the Sun

Possible Changes

By F. R. Moulton

The School Room Dust Problem

Lantern Projection Distances

Correspondence

The Charge and Nature of the Alpha Particle

Sir George Darwin on “Tides in the Solid Earth.”

Malted Coffee

Photographing without Light

The Actinic Activity of resin and Allied Bodies on a Sensitized Plate

Metallography: A New Science

The Application of the Microscope to the Study of Metals

By Walter Rosenhain

How the Snake uses his Tongue

Is It a Sense Organ of Direction

By G. R. O*amp*apos;Reilly

Electrical Notes

Engineering Notes

Trade Notes and Formulæ

Departments

    Purchase To Read More

    Already purchased this issue? Sign In to Access
    Select Format
    June 19, 1909

    Feeling Dead Inside?

    Tear Into Our eBook