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Self-Propelling Coaling Vessel

With Automatic Self-Registering Weighing Machine by the English Correspondent of the Scientific American

The Development of armored War Vesasels.—IV

Armor plating in the united states

By J. H. Morrison

Tests of Alcohol Lamps and Stoves

With Comparisons of Measurements, Operations, Power, and Fuel Consumption

By S. M. Woodward and B. P. Fleming

Production of Mineral Waters in the United States in 1906

Effect of Moisture on Wood

Iron Slag

The Utilization of a Waste Product

By Theodor Koller

New Problems of the Weather

Temperature Conditions at Great Elevations Secured by Rites and Balloons

By Willis L. Moore, W. J. Humphreys and O. L. Fassig

Preliminary Coal-Washing Tests

Modern applications of Superheating to Marine Steam-Boilers

The Tests and Results of the Two Types of Superheaters

By Arthur Spyer

Torsiometers as Applied to the Measurement of Power in Marine Turbines

Its Losses Under Various Conditions of Action

By Archibald Denny

The Interchange of Heat in Steam Engine Cylinders

Its Losses Under Various Conditions of Action

By W. F. Cleveland

Different Types of Ice Houses

Their Construction, Ventilation, and Economies

By A. S. Atkinson

Recent Contributions to Electric Wave Telegraphy

An Interesting Discourse by Prof. Fleming on the Rapid Advance in the Commercial Application of Wireless Telegraphy.-Further Progress Dependent On Exact Measurement Of Electric Waves

The Telescope

Its genesis and its a chievements

By D. B. Marsh

Causes of the Quality Strength in Wheaten Flour

By A. E. Humphries

Electrical Notes

Engineering Notes

Trade Notes and formulæ


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