PREFACE.

PHILIPP REIS.

CHAPTER I. BIOGRAPHY OF THE INVENTOR.

CHAPTER II. THE INVENTOR'S APPARATUS.

CHAPTER III. THE CLAIM OF THE INVENTOR.

CHAPTER IV. CONTEMPORARY DOCUMENTS.

CHAPTER V. TESTIMONY OF CONTEMPORARY WITNESSES.

APPENDIX I. Comparison of Reis's Transmitters with Recent Instruments.

APPENDIX II. On the Variation of Electric Resistance at a Point of Imperfect Contact in a Circuit.

APPENDIX III. Comparison of Reis's Receivers with Recent Instruments.

APPENDIX IV. On the Doctrine of Undulatory Currents.

ADDITIONAL PREFERENCES CONCERNING REIS'S TELEPHONE.

BOOKS RELATING TO APPLIED SCIENCE PUBLISHED BY E. and F. N.

JUST PUBLISHED. In super-royal 8vo, 1168 pp., with 2400

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FOOTNOTES:

PHILIPP REIS:

INVENTOR OF

THE TELEPHONE.

A BIOGRAPHICAL SKETCH,

WITH DOCUMENTARY TESTIMONY, TRANSLATIONS OF THE ORIGINAL PAPERS OF THE INVENTOR AND CONTEMPORARY PUBLICATIONS.

BY

SILVANUS P. THOMPSON, B.A., D.Sc., PROFESSOR OF EXPERIMENTAL PHYSICS IN UNIVERSITY COLLEGE, BRISTOL.