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Heinrich Schliemann


By Irving J. Manatt

An Astronomer's Imaginary Visit to Venus

Bathypelagic Fishery

The Earth as the Morning Star of Mars

Colorado—A Geologist's Notes by the Way

A Quantitative Reaction for Lignin

By R. Benedikt and M. Bamberger

Ozone—Its Commercial Production and Application

By Ernst Fahrig

Rolling Curves

Analysis of Commercial Gelatine Plates

Philadelphia a Port of Entry

Prizes Awarded and Offered at the Academy of Sciences, Paris, on December 29, 1890

Iron-Aluminum Alloy

The Power of Water, or Hydraulics Simplified

The Flow of Water through Pipes

By G. D. Hiscox

Electric Motive Power on Elevated Railways

General Design of an Electrical System for the Elevated Roads of Chicago

By William Nelson Smith

Cure for Baldness

By Edward Blake

Sutton's System of Telephany

Useful Engineering Books

Building Plans and Specifications


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February 28, 1891

Of Shamrocks and Science

Happy St. Patrick’s Day