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Features

Yellowstone Park

Credit

Earth Currents

Algine

Common Colors and Poisonous Colors

Injury to Fish by Sewage and Waste Waters

Reducing and Intensifying Negatives

A Project to Explore the Earth's Center

An Antiseptic Vessel

Fouque's Photographic Seismograph

Sibley College Lectures.-VIII

The Cornell University Non-Resident Lecturers in Mechanical Engineering

By Charles T. Porter

Marine Engine Cranks and Shafts

Flexible Crank and Propeller Shafting in Lieu of Rigid Shafting for Marine Propulsion *

By J. F. Hall

A Wagon Wheel without Axle

A Watch without Hands

Recent Progress in Chemistry

By H. Carrington Bolton

On the use of Models for Instruction in the Magnetism of iron Ships

Pollak's Regenerating Pile

Molecular Weight of Liquid Water

Edison's New Telephone Apparatus

Fehling's Liquor as a Reagent

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    June 19, 1886

    Beyond XX and XY

    Biology. Identity. Equality.