Feature

Saw Replaces Explosives in Coal Mining

Positive and Negative Electrons Apparently Produced in Pairs

Prediction of Tidal Wave Forestalls Harbor Damage

Petroleum Said to Come from Garbage of Sea

Reinforced Concrete: “A Classic Invention”

New Spectra Are Explored by German

In Science Fields

Thousands of Animals Used Sponge as House

New Inventions Make Possible More Accurate Time Keeping

New Ascent Will Try to Pass Heights Reached by Piccard

First Chemical Evidence of Artificial Transmutation

New Discovery Shows How Films Hold Fast to Metals