Improved Balanced Slide Valve, The Hercules Target

Professor Chandler on Boiler Incrustations

Notes on New Discoveries and New Applications of Science

Useful Recipes

The Foot Lathe

Polytechnic Association of the American Institute

Thomas B. Stillman

Decay of Gutta-Percha and India-Rubber

Recent American Patents

Hand Washing Machine

Livermore's Fishhook

Russ's Scissors Sharpener

Plating Iron with Copper

The Way Steel is Made in Jersey City

Manias

Destruction of Boilers by Unequal Expansion of Iron

Patent Claims

Patent-Office Decisions

Patent Office

Patents Granted for Seventeen Years

Best Mode of Introducing Inventions

Patent Agency Office