Improved Spinning Mule

Lubricating Oils

Measurements of Friction of Lubricating Oils *

Copying Maps and Plans

Photographic Surfaces More Sensitive for the Green, Yellow, and Red Rays

Improved Tandem Engines

The Saint Etienne Tramways

Spring Motors for Vehicles

The Dutton Sluices

Improved Spring Wheels

Combined Wood and Iron Wheels for Portable Engines

On the Influence of Punching Holes in Soft Steel

On Japanese Camphor Oil

A Veranda

The World's First Meridian

Transmission of Electric Power at Bienne, Switzerland

Photographing the Larynx

Obstruction of Drain Pipes by Roots

The Hypnoscope

Iceland

A Group of Cactus in Jamaica

Underground Water ad the Moisture of the Soil

Water Meters

The Liquefaction of Gases

An Absolute Standard of Light

Reduction by Electrolysis