Volume 38, Issue 2
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Features
The Mechanical Theory of Forgetfulness
The Patent Middlings Purifier Case.--Another Important Decision by the Supreme Court
The Trouve Multiple Telephone
To Our Subscribers
Chloroform
Notes of Patent Decisions
The New York Elevated Railway
Mineral Wool
Communications
Buildings of the Paris Exposition of 1878
Stolp's Complete Gear Instrument
Mery's Weighing Scoop
Curious Blood Disks
Steam Syphon Pumps
Communications Received
Wants and Business Inquiries
The Scientific American
The Most Popular Scientific Paper in the World