22 Mr. Edward Arnold's Atctumn Announcements. 



AN INTRODUCTION TO THE STUDY 



OF THE PROTOZOA. 



Mttb Special IReference to tbe parastttc jForms. 



By E. A. MINCHIN, F.R.S., 



Professor of Protozoology in the University ok London. 



With 194 Figures and Bibliography. Demy 8vo, 21s. net. 



An important treatise, dealing with the subject in a thorough and 

 systematic manner, not only for the professed zoologist, but also for 

 all who on the medical side have occasion to study the parasites 

 causing disease. The trypanosomes and other blood-parasites 

 which give rise to "sleeping sickness" and various fevers in both 

 men and animals come in for their full share of attention. 



ELECTROPLATING. 



By W. R. BARCLAY, A.M.I.E.E., 

 And C. H. HAINSWORTH, A.M.IE.E., 



Lecturers on Electkoplating and Electrical Engineering in the 

 University of Sheffield. 



Illustrated. Crown Svo. 7s. 6d. net. 



A practical treatise dealing with the fundamental principles of 

 electro-deposition, and also describing with the knowledge of an 

 expert their application in the technical arts of electro-silver-plating, 

 plating with gold, copper, nickel, etc., with a chapter on metal 

 colouring and bronzing. The treatment, though scientific, is through- 

 out simple and lucid, and suited to the needs of the practical man 

 and of the technical student. 



A GENERAL HISTORY OF THE 

 WORLD. 



By OSCAR BROWNING, M.A., 



Formerly Lecturer in History in the University of Cambridge. 



Crown Svo. Cloth. 5s. net. 

 Beginning with an account of the earliest civilizations of which 

 any knowledge has come down to us — those of Egypt and Babylon 

 — Mr. Browning traces the course of the main stream of history 

 down to our own day. For the sake of convenience the book is 

 divided into three conventional periods — ancient, mediaeval, and 

 modern — but there is no real break in the narrative : indeed, a 

 constant recognition of the continuity of history is one of the chief 

 features. How did the modern civiHzed world which we know 

 to-day come into being ? The answer to that question is contained 

 in this volume, set forth with a sense of proportion and perspective 

 which the author has acquired by an unusually long experience as 

 student and teacher in every branch of historical learning. 



