
CAMBRIDGE PHYSICAL SERIES. 

CONTENTS OF Mr WHETHAM’s ‘SOLUTION AND ELECTROLYSIS.’ 
I. Thermodynamics. X. Galvanic Cells. 
II. The Phase Rule. XI. Contact Electricity and Pol- 
Ill. The Phase Rule. Two : arization. 
Components. Solutions. XII. The Theory of Electrolytic 
IV. Solubility. Dissociation. 
V. Osmotic Pressure. XIII. Diffusion in Solutions. 
VI. Vapour PressuresandFreez- XIV. Solutions of Colloids. 
ing Points. Additions. 
VII. Theories of Solution. Table of Electro-chemical 
VIII. Electrolysis. Properties of Aqueous 
IX. Conductivity ofElectrolytes. Solutions. ‘ 
Electricity and Magnetism: an Elementary Text-book, 
Theoretical and Practical. By R. T. GLAzEBROOK, M.A., F.R.S., 
Director of the National Physical Laboratory and Fellow of Trinity 
College, Cambridge. Crown 8vo. Cloth. 1—440 pp. 7s. 6d. 
A theneum.—‘ Tf the nature of the book be taken into consideration, it 
will be found unusually free from the influence of the examination spirit. 
The writing is bright and interesting, and will stimulate a desire, we think. 
for further study.” 
Guardian.—‘‘ Every schoolmaster and teacher who has under con- 
sideration the selection of a text-book for his better students should most 
certainly look into this book. The information is everywhere absolutely 
sound and reliable.” 
PREFACE. Some words are perhaps necessary to explain the publi- 
cation of another book dealing with Elementary Electricity. A considerable 
portion of the present work has been in type for a long time; it was used 
originally as a part of the practical work in Physics for Medical Students 
at the Cavendish Laboratory in connexion with my lectures, and was 
expanded by Mr Wilberforce and Mr Fitzpatrick in one of their Laboratory 
Note-books of Practical Physics. 
When I ceased to deliver the first year course I was asked to print my 
lectures for the use, primarily, of the Students attending the practical 
classes ; the lectures on Mechanics, Heat and Light have been in type for 
some years. Other claims on my time have prevented the issue of the 
present volume until now, when it appears in response to the promise made 
several years ago. 
Meanwhile the subject has changed ; but while this is the case the 
elementary laws and measurements on which the science is based remain 
unaltered, and I trust the book may be found of service to others besides 
my successors at the Cavendish Laboratory. 
The book is to be used in the same way as its predecessors. The appa- 
ratus for most of the Experiments is of a simple character and can be 
supplied at no great expense in considerable quantities. 
Thus the Experiments should all, as far as possible, be carried out by 
the members of the class, the teacher should base his reasoning on the 
results actually obtained by his pupils. Ten or twelve years ago this 
method was far from common; the importance to a School of a Physical 
Laboratory is now more generally recognized ; it is with the hope that the 
book may be of value to those who are endeavouring to put the method in 
practice that it is issued now. 
