First published September 13 th 1934 



Second Edition September 1938 



Third Edition May 1946 



Fourth Edition 1950 



Fifth Edition, revised and reset, 1956 



Sixth Edition, revised and reset, 1966 



6.1 

 Catalogue no. 12/4103/62 



Printed in Great Britain by 

 Butler and Tanner Ltd., Frome and London 



