Apparatus for Providing a Steady Platform for Guns, Search Lights, Telescopes, Etc.

H. M. S. Victoria

The Birmingham Compressed Air Power Supply

The Production of the Alloys of Aluminum and Silicon in the Electric Furnace (Cowles' Process)

Improved Refrigerating Machinery

Filtering Arrangement

The Manufacture of Rubber Clothing

The Construction of Balloons

Painting in Sand

The Pavilion of Paraguay at the French Exposition

The Highest Chimney in the World

The Method of Quarter Squares

Magnesium as a Reagent

International Placards at the Exposition

A Trip through the Sewer in Hamburg

Instruments for Measuring Radiant Heat

Lecture II.

Constant Focus and Depth of Focus in Photographic Lenses

Atmospheric Electricity

Glacial Geology

Building Plans and Specifications

Useful Engineering Books

Spermine