Volume 21, Issue 546supp
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Features
Algine
Credit
Earth Currents
Injury to Fish by Sewage and Waste Waters
Reducing and Intensifying Negatives
A Project to Explore the Earth's Center
Common Colors and Poisonous Colors
Fouque's Photographic Seismograph
An Antiseptic Vessel
Sibley College Lectures.-VIII
The Cornell University Non-Resident Lecturers in Mechanical Engineering
A Watch without Hands
A Wagon Wheel without Axle
Marine Engine Cranks and Shafts
Flexible Crank and Propeller Shafting in Lieu of Rigid Shafting for Marine Propulsion *