Volume 13, Issue 20
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Features
Tyndall on Radiation
An Insect Show
The Double Magic Lantern
Newhall's Lamp Attachment
Colors
Farmers' Club
The Jewelry Manufactured at Birmingham England
Recent American Patents
Miscellaneous Summary
Lock Up the Throttle Valve
Losie's Thimble
To Our Readers on the Pacific Coast
The Produce Exchange and the Course of the Grain Trade
What is Superheated Steam?
Small Boiler and Engine
Patent Claims
Issued from the United States Patent-Office