The elements of non-Euclidean plane geometry and trigonometry, by H. S. Carslaw.

PREFACE

vii

from Dr. F. S. Macaulay, who read all the proofs and made
many valuable suggestions and amendments. The work
of another of the Editors of this Series, Mr. C. S. Jackson,
has made my labour lighter, and one of my colleagues in
Sydney, Mr. R. J. Lyons, has also read a great part of the
final proofs.
II. S CARSLAW.
SYDNEY, September, 1914.
NOTE.
The final proofs of this book had been corrected, and the
foregoing preface written and set up in type before the
outbreak of the war.
In the course of years the time may come when such cooperation as I have here acknowledged will again be possible.
H. S. C.
SYDNEY, January/, 1916.