Volume 31, Issue 791supp
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Features
Schliemann
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
Ozone—Its Commercial Production and Application
Analysis of Commercial Gelatine Plates
Rolling Curves
Iron-Aluminum Alloy
Prizes Awarded and Offered at the Academy of Sciences, Paris, on December 29, 1890
Philadelphia a Port of Entry
Electric Motive Power on Elevated Railways
General Design of an Electrical System for the Elevated Roads of Chicago
The Power of Water, or Hydraulics Simplified
The Flow of Water through Pipes