Manufacture of Zinc Oxide and Bartlett Lead

Steam on Common Roads

Is Man a Feeble Animal?

Resemblances among Animals

Curculio Extirpation Possible

The Lantern Fly

[By Edward CH. Day, of the School of Mines, Columbia College]

Imported Insects and Native American Insects

Facts and Recipes

A Chill Room in a Meat Packers' Establishment

Kelly's Lasting Machine Boring Bit

Foster's Convertible Cultivator, Hoe, Fork, Rake, and Spade

A Denunciation of Water Meters

The Darien Canal Survey

Statics and Dynamics of Friction

Gas Stoves for Ordinary Domestic Use

Ice by Machinery

The History of a Defunct Horse

A Glance at Aeronautical Science--Review of a Paper Read at a Meeting of the Aeronautical Society in London, by W. Clare

Scientific Intelligence- July 16, 1870

Correspondence of the Scientific American

Vassar College

A Sewing Machine-Patent Extension--An Irate Opponent

Answers to Correspondents- July 16, 1870

Recent American and Foreign Patents- July 16, 1870

Official List of Patents- July 16, 1870

Applications for the Extension of Patents- July 16, 1870