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Chemistry of Rubber

Development in Our Knowledge of Caoutchouc from Columbus to Our Own Times

By S. C. Bradford

Experimental Wireless Telegraphy and Telephony—III

Simple Receiving Apparatus and Elementary Circuits for the Beginner in the Art

By Louis Gerard Pacent and Austin C. Lescarboura

The Law of Irreversible Evolution

Critical Notes upon Dollo's Famous Hypothesis

By Branislav Petronievi*amp*ccaron;s

Window Glass

Hand and Machine-Made Panes, and the Machines That Make Them

By John Oliver LaGorce

Physical Chemistry in the Industries

Some of the General Principles Which Govern Its Application to Manufacturing Processes

By James C. Philip

The Lilies of the Field

Beautiful and Striking Wild Lilies of California's Fields

By Francis M. Fultz

A New Alloy, Constitution of the Sun's Nucleus and Atmosphere, and more

An Artificial Fertilizer

Studies on the Influence of Fluorides* on Plants

By A. Gautier and P. Clausmann

Nomographic Charts for the Aerial Propeller


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