1Introduction
6CHAPTER V. ON WIRING, CONNECTING UP, AND LOCALISING FAULTS.
2PREFACE.
7ADDENDUM. The Gassner Battery.
3CHAPTER II.
8WHITTAKER'S LIBRARY OF ARTS, SCIENCES, MANUFACTURES AND INDUSTRIES.
4CHAPTER III. ON ELECTRIC BELLS AND OTHER SIGNALLING APPLIANCES.
9Memorable Quotes
5CHAPTER IV. ON CONTACTS, PUSHES, SWITCHES, KEYS, ALARMS, AND RELAYS.