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Features

Car-Ferry Steamer “Detroit,” Michigan Central Railroad

Epochs in Marine Engineering

By George W. Melville

The Manufacture of Bronze Colors

The Steel Hardening Metals

By Joseph Hyde Pratt

The Artificial Production of Rubies

Distance Control by Electric Waves

A Novel Conduit Line

By the Paris Correspondent of Scientific American

Producer-Gas Power Plants

By A. Frederick Collins

The Cultivation of Medicinal Plants

By E. M. Holmes

Daytime Observations on the North Star

The N-Rays of M. Blondlot

Discovery

By C. G. Abbot

Discoveries made in Recent Excavations at Westminster Abbey, London

Heat Transmission: What it is and how it is Attained

The Palace at Nippur not Mycenaean but Hellenistic

Electrical Notes

Engineering Notes

Trade Notes and Recipes

Patents!

Selected Formulæ

Departments

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