The Cañons of the Colorado

American Archæology

The Fire-Bush

Forest-Tree Borers

The Collodio-Bromide Emulsion Process

Edwards' Enlarging and Copying Camera

Chromo-Photography

A New Albert-Type Process that Reproduces Color in Pictures

Blue Alizarin

Dyes and Colors

On the Use of Chalk in Dyeing Wool

Manganese and Chrome Blues

Direct Ink Printing from Glass Negatives

Hearing by the Teeth

Food

Absorption of Carbonic Oxide

Contributions to Blowpipe Chemistry

First Paper.—New Blowpipe Bellows*

100-H. P. Horizontal Condensing Engine

Goods Engine, Paris and Orleans Railway

Portable Mining Engine

Brown's Tramway Locomotive

The Paris Exhibition

A Military Railway

A Trade Mark Case

Boats' Rigs

A Small Boat for Rough Water

The Pieri Rifle

The Magneto Electric Light

New Arrangement for Telephone

Electro-Harmonic Telegraphy

Jablochkoff's Method of Electric Lighting

G. N. Cheney, of Syracuse, N. Y

Rousseau as a Chess Player

The Great Correspondence Match— America Vs. England

Scientific American Chess Record

Solutions to Problems

Frank Leslie's Problem Tournament of 1858