The Cañons of the Colorado

American Archæology

Forest-Tree Borers

The Fire-Bush

Edwards' Enlarging and Copying Camera

The Collodio-Bromide Emulsion Process

Chromo-Photography

A New Albert-Type Process that Reproduces Color in Pictures

Blue Alizarin

Direct Ink Printing from Glass Negatives

Dyes and Colors

Manganese and Chrome Blues

On the Use of Chalk in Dyeing Wool

Absorption of Carbonic Oxide

Food

Contributions to Blowpipe Chemistry

First Paper.—New Blowpipe Bellows*

Hearing by the Teeth

Brown's Tramway Locomotive

100-H. P. Horizontal Condensing Engine

Goods Engine, Paris and Orleans Railway

The Paris Exhibition

Portable Mining Engine

A Trade Mark Case

A Military Railway

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

Frank Leslie's Problem Tournament of 1858

The Great Correspondence Match-- America Vs. England

Scientific American Chess Record

Solutions to Problems

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

Rousseau as a Chess Player