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Features

Compressed Air Clocks

Boilers with Corrugated Flues

Common Sense Sanitation

By S. Case

Launch of the City of Rome

Relations of Science to Speculation

By J. W. Dawson

Oil Pressing Machinery

Paper Pulp from Wood

To Take Positives in the Camera Direct

By J. B. Obernetter

The Niobrara Group

By Chas. H. Sternberg

An Electrical Speech-Recorder

The Roman Villa near Brading

Reduction of Over-Printed Proofs

By W. England

The Ruins of Libydia

Saw Palmetto

The Geology of Florida

Fruit Sirups

By Adolph G. Vogeler

Are we Right Sighted?

The Impurities in Water, and their Influence upon its Domestic Utility

By George Stillingfleet Johnson

Chlorophyl

Hardness of Water

By V. Wartha

Liquefaction of Gaseous Mixtures

By Mm Cailletet and P. Hautefeuille

The Alloys of Manganese

Chemical Action in a Magnetic Field

By Ira Remsen

Society of Chemical Industry

Estimation of Butter

By L. Medicus and S. Scherer

Filtering Apparatus for Viscid Liquids

Twisting Filter Press

Selenium as a Heat Regulator

Phosphorus.—Symbol P.—Combining Weight, 31

Terquem's Gas-Burner

Detection of Phosphorus

By F. Selmi

The Cat and its Relations

By Frederic A Lucas

On a Curious Actinic Phenomenon

By T. L. Phipson

A Delicate Test for Mercury

Getting Rid of the Rats

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