Improved Brick Machine

Oxidizing Agents

Du Motay's Process for Oxyhydric Illumination

Can Buildings be Set on Fire by Steam Pipes?

The Austrian Show Before the Senate

Collapsing Boiler Flues

Prospects for 1873

Practical Advice to Exhibitors in Austria

An International Show in Spain

The Sewing Machine Monopoly

Properties and Uses of Kieserite

To Intending Exhibitors at the Vienna Show

Balancing Machinery

Improved Feathering Paddle Wheel

Turton's Compensated Spring Safety Valve

Professor Tyndall's Third Lecture in New York Crystals and Light

Gleanings in Science and Art

Nine Horse Power Compound Boat Engine

Design for Ball Ground Pavilion

Scientific and Practical Information

Bent Woodwork in Carriage Making

Patent Office Decisions

Decisions of the Courts

United States Circuit Court---Eastern District of Pennsylvania

Recent American and Foreign Patents

Under This Heading We Shall Publish Weekly Notes of Some of the More Prominent Home and Foreign Patents.

Answers Correspondents