BY THE SAME AUTHOR.
ELECTRIC WAVES:
Researches on the Propagation of Electric Action
with Finite Velocity through space.
Translated by D. E. JONES.
With a Preface by LORD KELVIN.
8vo. 10s. net.
ELECTRICIAN:-"There is not in the entire annals of scientific research a more
completely logical and philosophical method recorded than that which has been
rigidly adhered to by Hertz from start to finish. We can conceive of no more delight-
ful intellectual treat than following up the charming orderliness of the records in the
pages before us. The researches are a splendid consummation of the efforts which
have been made since the time of Maxwell to establish the doctrine of one ether for
all energy and force propagation-light, heat, electricity, and magnetisın. The original
papers, with their introduction, form a lasting monument of the work thus achieved.
The able translation before us, in which we have a skilful blend of the original mean-
ing with the English idiom, and which is copiously illustrated, places the record of
these researches within the reach of the English reading public, and enables it to study
this important and epoch-making landmark in the progress of physical science."
IN THE PRESS.
THE PRINCIPLES OF MECHANICS.
With a Preface by H. von HELMHOLTZ. Translated by
D. E. JONES and J. T. WALLEY.