PREFACE k

My friend and colleague^ Mr» E. F. Coles, B.A.9 has advised
me on Mstorical matters and helped me with a general revision
of the work. My friend,, Mrs. G. Sutler., has given valuable
secretarial assistance.

I owe a great deal to the students I have met when taking

Adult Education Classes^ to my pupils at the Coopers'

Company's School. Their questions and arguments have

• stimulated and clarified my OWB thoughts; and the matter and

arrangement of the book has largely determined by this

two-fold teaching experience.

' for the shortcomings of the book3 the responsibility is

entirely mine.

STEWART.

London*

July, 1938.