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Features

Good Work at the Mints

The Earnings of the Working Classes

The International Exhibition of New South Wales

Progress of German Cutlery

Utilization of Slag

Dairy Cottage

Heavy Ordnance

Zing-Dust as a Cause of Fires

Modern Musketry

The Lighthouse of Chipiona, Cadiz, Spain

The De Bay Propeller

A Durable Spur Wheel

Hahn's Iron Scaffolding

Leuner's Adding Pencil

Millot's Grain Separator and Grading Machine

Theory and Practice in Bread Making

By Geo. M. Wiiitaker

Metzger's Improved Machinery for Manufacturing Vermicelli and Macaroni

Fraudulent “Greening” of Oysters in France

Designing for Textiles

The Lebrousse Paper Pulp Machine

A New Buckskin Loom

Warping Bobbins with Iron Heads

Sliver Guide for Spinning Machines

Apparatus for Testing the Evenness of Yarn

A Drag for Throstle Bobbins

Classification of Colors

A Communication to the Photographic Society of France

By M. Cros

Manchester Literary and Philosophical Society

By J. P. Joule

Porcelain Painting

By V. Joclet

Liquid Carbonic Acid from Bicarbonate of Soda

Notes on the Diffusion of Atmospheric Impurities in Occupied Rooms

A New Device for Magnetizing Compass Needles

Plante's Secondary Battery

Steeling Copper Plates

By R. Bottger

Carbonate of Ammonia from Gas Liquor, without the use of Acids

By F. W. Brothers

Physical Society, London

Radiometer Pressure

Du Fay's Theory

Influence of the Different Colors of the Spectrum on the Development of Animals

By E. Yung

Spectrometric Measurement of High Temperatures

By A. Crova

Dynamo-Electric Machines

By Edwin J. Houston and Elihu Thomson

Note on the Absorbing Power of Vegetable Charcoal

Archæological Explorations in Tennessee

By F. W. Putnam

The Development of Africa

Is the Moon Inhabited?

[From the French of Camille Flammarion]

Porosity of Building Stone

Professor Purser on “Tides and Tidal Currents”

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