MARVELS OF MODERN SCIENCE

By PAUL SEVERING

Edited by THEODORE WATERS

1910



CONTENTS

CHAPTER I
FLYING MACHINES
Early attempts at flight. The Dirigible. Prof. Langley's
experiments. The Wright Brothers. Count Zeppelin. Recent aeroplane
records.

CHAPTER II
WIRELESS TELEGRAPHY
Primitive signalling. Principles of wireless telegraphy. Ether
vibrations. Wireless apparatus. The Marconi system.

CHAPTER III
RADIUM
Experiments of Becquerel. Work of the Curies. Discovery of Radium.
Enormous energy. Various uses.

CHAPTER IV
MOVING PICTURES