Arthur Schopenhauer

William Crookes, F.R.S., President of the Chemical Society

On a Trial of a Water Tube Boiler at Sibley College, Cornell University

The Eames Vacuum Brake

Copper Plate Printing

Machines for Beating Carpets

Gas Lighting and Dust

Chemical Reagents for Textile Fabrics

How to Turn a Sphere

The Great Telescope at Nice

Astronomical Society

The Mechanical Equivalent of Heat

Husband's Process of Photo-Lithography in Half Tone

The Direct Optical Projection of Electro-Dynamic Lines of Force and other Electro-Dynamic Phenomena

A very Valuable Lesson for those who use Anæsthetics

The Electrical Odontoscope

Simple Sphygmographs

Chinese Dentistry

Duration of Memory in Wasps

Gravity

Physical Society

The Myrobalan or Cherry Plum

(Prunus Cerasifera)

A New Alkaloid

Building Plans and Specifications