English

Harper's wireless book; how to use wireless electricity in telegraphing, telephoning and the transmission of power

CONTENTS INTRODUCTION vii Part I THE WHY AND HOW OF WIRELESS CHAPTER I.— WHY WIRELESS WORKS 3 Electromagnetic Waves — High-frequency Oscillations CHAPTER II.— WAYS AND MEANS 8 Various Types of Aerials — Methods of Connecting Aerials — Materials for Aerials — Insulating — Grounding CHAPTER III.— INSTRUMENTS FOR SENDING 17 Principles of the Induction-coil — Transformers — Condensers — The Helix — Spark-gaps — Aerial Switches CHAPTER IV.— INSTRUMENTS FOR RECEIVING 29 The Detector — Tuning — Tuning-coils — A Simple Carbon Detector — A Simple Mineral Detector — A Simple Potentiometer — Connecting a Loose-coupled Coil CHAPTER V.— TUNING 41 Directive Wireless Transmission Part II HOW TO BUILD AND USE WIRELESS APPARATUS CHAPTER VI.— ESTABLISHING A STATION 51 Selecting a Site for the Station — Constructing the Aerials — Insulating — The Ground CHAPTER VII.— HOW TO MAKE INSTRUMENTS 61 Outfits of Greater Scope — Telegraphic Codes CHAPTER VIII.— TALKING BY WIRELESS 69 Transmitting — Receiving — Laws Regulating Wireless Operation — International Rules CHAPTER IX.— VALUE AND USES OF WIRELESS CHAPTER X.— A BOY'S EXPERIENCE WITH WIRELESS TELEGRAPHY Part III WIRELESS TELEPHONY CHAPTER XI.— SOUNDS A

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