Protection of River and Harbor Water from Municipal Wastes

The Problem of sewage Disposal

Multiplex Telephony and Teleǵraphy—II

Electric Waves Guided by Wires

Radiant Enerǵy and Matter—V

Norǵine, a New Veǵetable Gelatine

A New Paris Double Track Iron Tube Tunnel

The Bells of Pisa's Leaninǵ Tower

The Yellow Poplar

A Substitute for Red Gum in BasKet Mahing

Port Improvements at Hyoǵo-Kobbé

Ocean Maǵnetic Work—II

Some of its Problems

Guiding Balloons by Automatic Wireless Siǵnals

Hydro-Electric Enerǵy from a Disused State Canal

Electricity Meters

How Electric Current is Measured

The use of Radio-Active Substances in Therapeutics

Automatic Alternatinǵ-Current Bloch Siǵnal System for Steam Railroads

Recent Bridǵe Construction in America

Some Observations on Modern Tendencies

Recent Development of Modern Gas Power Plants in the United States

Gas-Engine Waste-Heat to Turbine

The Sanders Teacher

Application of Geared Steam Turbine to Rolling Mill Drivinǵ

Meteorology and Aǵriculture