The Cycloid

Peer's Vertical Trip Hammer

New York Ship Building

Capt. Nortan's Projectile

Writing Fluids

[Abstract of a Lecture on the Chemistry of Writing Fluids, delivered before Bacon's Cincinnati Mercantile College, by Prof. Chas. W. Wright, and reported expressly for the Scientific American.]

Recent Foreign Inventions

Imponderable Agents—No. 6

Influence of Elevation upon Cholera

Oil and Health

New Species of Rattlesnakes

List of Patent Claims

Jointing of Belts

Sash Fastening

Regulating Water Level in Steam Boilers

Proportions of Vessels-Large Ships for Long Voyages

Paper Feeder

Mechanical Typographer

Joiner's Clamp

Foreign Patents

Drying Starch

Door Strip

Connecting Hubs with Axles

Cement for Bricks and Stones

Writing Pencil-Something to be Invented

Tinning Iron Plates

Curing Grass for Hay by Steam

Reform of the Patent Laws—Fees for Foreigners—Extension of Patents—The New Rule

Presentation

Fires in our City—The Annihilator

Currents of the Pacific

Report on Lubricating Oils in the Crystal Palace

Lubricators for Rail Car Axles

Governors of Engines

Experiments with Rotary Engines at the Crystal Palace

Baker's Furnace at the Crystal Palace

Awards of our Prizes

A Chapter of Suggestions, &C

Elevated Promenade and Railroad for Broadway

Interesting to Planters

Mechanics

Manufacturers and Inventors