Science. A descriptive Catalogue, stating the object
aimed at in each work, with their size and prices, will be forwarded on
application. Of those hitherto published, the sale of many thousands is
a sufficient indication of the manner in which they have been
appreciated by the public.

The following SERIES of a more ELEMENTARY CHARACTER is now in course of
publication. All the Volumes in this Elementary Series will be
handsomely printed in 18mo., and published at a low price to ensure an
extensive sale in the Schools of the United Kingdom and the Colonies:--

Euclid. For Colleges and Schools. By I. TODHUNTER, M.A., F.R.S., Fellow
and Principal Mathematical Lecturer of St. John's College, Cambridge.
3s. 6d. [Now ready.

An Elementary Latin Grammar. By H. J. ROBY, M.A., Under Master of
Dulwich College Upper School, late Fellow and Classical Lecturer of St.
John's College, Cambridge. 2s. 6d. [Now ready.

An Elementary History of the Book of Common Prayer. By FRANCIS PROCTOR,
M.A., Vicar of Witton, Norfolk, late Fellow of St. Catharine's College,
Cambridge. 2s. 6d. [Now ready.

Algebra for Beginners. By I. TODHUNTER, M.A., F.R.S. [In the Press.

The School Class-Book of Arithmetic. By BARNARD SMITH, M.A., late Fellow
of St. Peter's College, Cambridge. [In the Press.

The Bible Word-Book. A Glossary of Old English Bible Words, with
Illustrations. By J. EASTWOOD, M.A., St. John's College, Cambridge, and
Incumbent of Hope-in-Hanley, Stafford, and W. ALDIS WRIGHT, M.A.,
Trinity College, Cambridge, [Preparing.

*** _Other Volumes will be announced in due course._

WORKS BY I. TODHUNTER, M.A., F.R.S.,
Fellow and Principal Mathematical Lecturer of St. John's College,
Cambridge.

A Treatise on Algebra. For the Use of Colleges and Schools. With
numerous Examples. Third Edition, revised. Crown 8vo. cloth, 7s. 6d.

An Elementary Treatise on the Theory of Equations, with a Collection of
Examples. Crown 8vo. cloth, 7s. 6d.

A Treatise on Plane Trigonometry. For the use of Colleges and Schools.
With numerous Examples. Second edition, revised. Crown 8vo. cloth, 5s.

A Treatise on Spherical Trigonometry. For the use of Colleges and
Schools. With numerous Examples. Crown 8vo. cloth, 4s. 6d.

* * * * *
* * * *

A Treatise on Plane Co-ordinate Geometry, as applied to the Straight
Line and the Conic Sections. With numerous Examples. Third