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The Kentucky River Bridge

Improved Wheels for Colliery Corves

On the Effect of Punching on Iron and Steel Plates

By A. C. Kirk

Hardening and Tempering Steel

By Joshua Rose

The Lauria Floating Dock

Improvement in Gas Engines

New Typographic Machine

The Klotz Safety-Valve

Improvement in Methods of Repairing Structures with Beton or Concrete

By John C. Goodridge

The Remarkable Mountain Lumber Flumes of California

Obtaining Coloring Matter from Coal

Removal of Strong Odors from the Hands

Extraction of Silver from Cyanide Baths

By M. De Bibra

Bronze for Iron

By M. P. Hess

Rice Hulling and Brushing

A New Method of Detecting Alcohol, When Used as an Adulterant of the Essential Oils

By Edmund W. Davy


Gas Generator and Blowpipe

By Alex. C. Thomson

Improved Condenser

By Charles Rice

Flames Charged with Saline Dust

By M. Gouy

Extraction of Copper by an Acid Solution of Ferrous Chloride

By M. A. Hauch

Researches on the Gases Contained in the Tissues of Fruits

By M. A. Livache

Californian Stamps

New Organic Acid Occurring in Nature

By C. Stahlschmidt

Coloring and Preserving Photographs

By Joseph A. Schultz

Recovery of Gold from Solutions

Mineral Growth

Paper Negatives

The Cyanotype Process

Asser's Photo-Lithographic Process

Monochromatic Light in Photo-Microscopy

By Captain Abney


By Richard A. Proctor

The Source of the Gulf Stream

By I. E. Nagle

Influences of the Earth's Rotation

The Great Lick Telescope

The Rotation of the Sun

Prehistoric Trees

The Enemy of the Oyster

Boils, Carbuncles, Etc.

Fat in Animals

The Poison Oak of California

By James G. Steele

Rudolf L. C. Virchow

John Wilkinson's Problem Book

Scientific American Chess Record

Solutions to Problems

Stanley and Rousseau

Revolutionary Chess Anecdote

Napoleon Marache

Problems from the Pages of History


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    October 27, 1877

    Science for the Modern World