use Drainage suitable for
Australasian conditions. Everything is explained in a thoroughly
practical manner, and the illustrations and diagrams are exceptionally
valuable.

* * * * *

_AN INTRODUCTION TO THE INFINITESIMAL CALCULUS._

By H.S. Carslaw, M.A., D.Sc., F.R.S.E., Professor of Mathematics in
the University of Sydney. Second edition, revised. Demy 8vo., cloth,
5s. (_postage 2d._)

_London: Longmans, Green & Co._

* * * * *

_EASY NUMERICAL TRIGONOMETRY OF THE RIGHT-ANGLED TRIANGLE._

By Professor H.S. Carslaw, University of Sydney. With numerous
diagrams. Limp cloth, 2s. (_postage 1d._)

* * * * *

_DAIRYING IN AUSTRALASIA: Farm and Factory._

By M.A. O'Callaghan, Chief of Dairy Branch, Department of Agriculture.
Contains over 700 pages and more than 200 plates. Royal 8vo., cloth,
10s. (_postage 5d._)

The Dairy (London): "It gives in clear and unmistakeable language the
whole of the dairy manipulation from beginning to end ... His book is
of world-wide application and usefulness."

* * * * *

_MILK AND BUTTER TABLES:_

_With Notes on Milk and Cream Testing._

By M.A. O'Callaghan, author of "Dairying in Australasia." Demy 8vo.,
1s. (_postage 1d._)

* * * * *

_HERD TESTING RECORD BOOK._

Designed by M.A. O'Callaghan for Herd Testing Associations and Stud
Cattle Breeders. 200 leaves, foolscap size, strongly bound, 5s.
(_postage 1s._)

* * * * *

_PRACTICAL BIO-CHEMISTRY._

By H.L. Kesteven, D.Sc., Lecturer at Sydney Technical College. Paper
cover, 2s. 6d. (_postage 1d._)

* * * * *

_GEOGRAPHY OF NEW SOUTH WALES._

By J.M. Taylor, M.A., LL.B. Fourth edition, revised and enlarged, with
13 folding maps and 67 illustrations. Cloth gilt, 3s. 6d. (_postage
2d._)

* * * * *

_PRACTICAL PHYSICS._

By J.A. POLLOCK, Professor, and O.U. VONWILLER, Assistant Professor of
Physics in the University of Sydney. Part I. With 30 diagrams. Paper
cover, 3s. 9d. (_postage 2d._)

* * * * *

_MATHEMATICAL TABLES._

Edited, with Introduction, by J.D. ST. CLAIR MACLARDY, M.A., Chief
Examiner, Department of Public Instruction, New South Wales. Cloth
gilt, 3s. 6d. (_postage 3d._)

Contains the following Tables:--Seven F