Transcriber’s Note
The cover image was restored by Thiers Halliwell and is placed in the public domain.
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WAVES AND RIPPLES
A CHRISTMAS LECTURE AT THE ROYAL INSTITUTION: “WAVES AND RIPPLES IN THE AIR.”
Drawn by F. C. Dickinson.] Fig. 46 (see p. 109). [From the “Graphic.”
WAVES AND RIPPLES
IN
WATER, AIR, AND ÆTHER
BEING
A COURSE OF CHRISTMAS LECTURES DELIVERED
AT THE ROYAL INSTITUTION OF
GREAT BRITAIN
BY
J. A. FLEMING, M.A., D.Sc., F.R.S.
M. INST. E.E., M.R.I., ETC., ETC.
PROFESSOR OF ELECTRICAL ENGINEERING IN UNIVERSITY COLLEGE, LONDON
SECOND ISSUE, REVISED
LONDON
SOCIETY FOR PROMOTING CHRISTIAN KNOWLEDGE
NORTHUMBERLAND AVENUE, W.C.
43, QUEEN VICTORIA STREET, E.C.
BRIGHTON: 129, NORTH STREET
New York: E. S. GORHAM
1912
[PUBLISHED UNDER THE DIRECTION OF THE GENERAL LITERATURE COMMITTEE]
PRINTED BY WILLIAM CLOWES AND SONS, LIMITED,
LONDON AND BECCLES.
[vii]
PREFACE.
The Christmas Lectures at the Royal Institution are,by a time-honoured custom, invariably addressed to a“juvenile audience