Making the Universal Reagent
The Manufacture of Sulphuric Acid by the Chamber Process
Features
Influence of the Magnetic Field on the Initial Phase of the Electric Discharge
The Abrasion-Meter
A Device for Determining the Cutting Efficiency of Abrasive Wheels
Celebes Ore Deposits
Measurement of Heat Losses through Insulating Materials
A New Dew-Gage (Drosometer)
The Color of Water—I
A Valuable Compendium of the Literature on a Neglected Subject
The Electric Dog
Use of the Selenium Cell to make an Orientation Mechanism
A Unique form of Prehistoric Pottery
The Races of Russia—II
A Brief Outline of the Ethnic Background of the Czar's Former Domain
The Shell Builders-III
A Brief Introduction to the Study of Conchology
Super-Conductivity of Metals at Low Temperature
Spectrum Analysis and Atomic Structure
A Remarkable Application of the Quantum Theory
