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Features

The Bevis Adjustable Propeller

Capt. Swinburn's Portable Anchors

Rastrick's Tube-Scraper

Rowan's Safety Disc for Boilers

200 H. P. Horizontal Engine

Improved Sluice Valves

American Locomotives in Australia

Road and Agricultural Locomotive

Works of the Bethlehem Iron Company

By A. L. Holley and Lenox Smith

Thermal Conductivities of Rocks

Economic Science

The British Association Geography

Report on Underground Temperature

Railway Brakes

Life-History of Simplest Organisms

The Movements of Water in Plants

The Pearly Nautilus

Tidal Investigations.—The Admiralty Tables

The Color of Animals

Turning of Screw Steamers

Chemical Constitution of the Solar System

Action of Oils On Copper

Excluding Germs from Operating Rooms

Removal of Eddystone Lighthouse

Electric Signal for Divers

Luminous Meteors

Electrical Smoke Figures

New Double Current Telegraph Key

By P. Trimmer

The Resistance of Ships

Theiler's Relay

Zirconia for the Oxy-Hydrogen Light

By John Christopher Draper

Hardened Glass for Laboratory Purposes

By J. W. Swan

A New Mordant

Washing Out Flasks by Inversion

By P. Townsend Austen

Silk Production

Detection of Organic Compounds in Vegetable Tissues

By Ottomar Herrmann

New Photo-Printing Process—The Despaquis Method

By Ernest Lacan

Removing Varnish

Polygonoscope

Instantaneous Photography

Measurement of Height of Clouds

By A. Mallock

Plate-in-the-Bath Pictures

By Fred. Scott Archer

New Microscopic Attachment

A Simple Device for the Illumination of Balsam-mounted Objects for Examination with certain Immersion Objectives whose “ Balsam Angle” is 90° or upwards

By J. J. Woodward

An Ancient Beehive

On the Fluid Extract of Jaborandi

By Francis V. Greene

The Ramie Fiber

Death Bed Studies

American Workmen from a European Point of View

The Poison of Small-Pox

The Filling of Wafer Capsules

By J. C. Wharton

Insects in Flour

Researches on the Consumption of Oxygen and the Excretion of Carbonic Acid in Man

By Dr. Speck

Fresh Meat Transportation.

Eclipses of the Moon

Photography of the Sun's Rotation

By Captain Abney

The Moons of Mars

Robert H. Seymour

Historical Chess Anecdote

London Chess Tournament of 1851

Impromptu Sentiment

Delivered at the opening festival of toke New York Chess Club, October, 1856

By D. W. Fiske

Scientific American Chess Record

Scientific Queen Problem

The London Tournament of 1851

Solutions to Problems

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    October 13, 1877

    Beyond XX and XY

    Biology. Identity. Equality.