SA Supplements

Tissandier's Electric Balloon

Exploration of Caves by Electricity

On Secondary Batteries and the Electrical Storage of Energy

The Most Sensitive Galvanoscope

Firing of the Multicharge Gun

The Haskell Multicharge Gun

Elevated Tracks in new Orleans

Improved Vertical Tubular Steam Boilers

The Blair Bridge, Nebraska

The American Dredge Boats at Panama

Feldmann's Apparatus for the Distillation of Ammoniacal Liquor

Lime Cartridges for Blasting

U. S. Launch Stella

The Liquefaction of Oxygen and the Solidification of Carbon Disulphide and Alcohol

The Sand Blast File Sharpener

Earth Movements in Java

Krakatoa

The American School at Athens

The Swiss Meteorological Observatory on Mount Santis

Portable Disinfecting Chamber

Premature Baldness

A Stroke of Lightning

Some Observations on Albuminuria

Patents