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High Speed Steamships

Improved Fuel Feeders

High Pressure Filtering Press. —System of Bertin-Godot

Quartz Crushing Machinery

Gold Mining

Electric Exploding Apparatus for Mining Purposes

Equipotential Law Followed by Nobili's Rings

Practical Notes of Plumbing

By P. J. Davies

A Curious Craft

The Optical Requirements for Photographing on a Scale of Nature

Mercury Intensifiers

By Cosmo I. Burton and Arthur P. Laurie

Winchester Cathedral

The Great Wall of China

Pistachia Gum

Detection of Gold

Lifting Tackle

Knots and Splices

Lycopodine, the First Alkaloid of the Vascular Cryptogams

By Karl Boedeker

The Cultivation of the Ramie Plant

Resistance of Grape Vines to Phylloxera in Sandy Soil

Oil Adulteration


By D. P. Penhallow

Cotton and its Future.—An Opportunity for Invention

Areas of Inland Waters

Dredging in the Mediterranean

On the Cause of the Arid Climate of the Western Portion of the United States

By C. E. Dutton


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February 11, 1882

20% Sitewide for President's Day