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An Elephant Battery in India

The Newly Discovered Phosphate Beds of Florida

By Albert R. Ledoux

The Lady Cricketers

Lessons from Fields and Lanes

The Reef off Pernambuco

India Rubber

Astronomical Notes—The Lick Observatory in Winter

The Wonders of a Celestial Journey

The Prophet Flower


After Six Hundred Years of Burial

Fall of Meteorites in Iowa

By Joseph Torrey and Edwin H. Barbour

Extent of the Roman Catacombs

Ancient Athens

Improved Ore Crushing Mill

The Punctuality of Trains

The Great Siberian Railroad

Canalization of the Seine

Four New Academicians

By Marcus Benjamin

Instruments for Drawing Curves

VIII.—The Cissoid, And Associated Curves.

By C. W. MacCord

Electrical Relations of the Brain and Spinal Cord

Experiments on Electric Undulations

Pharmaceutical Society of Great Britain

The Otis Electric Elevator

A New Method for the Analysis of Zinc and Copper Alloys

By H. N. Warren

Sealing Tubes under Pressure

By A. Richardson

Hydride of Phosphorus

Chemical Constituents of Apples

Apparatus for the Determination of Ammonias in Sand and Sewage

By Allen Hazen

Methods of Bacteriological Research, with some Account of Bran Fermentation

By J. T. Wood

Oil of Wintergreen

Note on the Isolation of the Nitrifying Organism

By R. Warington

Building Plans and Specifications


Useful Engineering Books


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    July 12, 1890

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