A treatise on spherical trigonometry, and its application to geodesy and astronomy, with numerous examples. By John Casey.

Seventh Edition, Price 4/6; or in two parts, each 2/6.
THE FIRST SIX BOOKS
OF THE
ELEMENTS OF EUCLID,
With Copious Annotations and Numerous Exercises.
BY
JOHN CASEY, LL.D., F.R.S.,
Fellow of the Royal University of Ireland; Member of the Council
of the Royal Irish Academy; &o., &c.
Dublin: Hodges, Figgis, & Co. London: Longmans, Green, & Co.
OPINIONS OF THE WORK.
The following are a few of the Opinions received by
Dr. Casey on this Work:From the REV. R. TOWNSEND, F.T.C.D., &c.
"I have no doubt whatever of the general adoption of your
work through all the schools of Ireland immediately, and of
England also before very long."
From the " PRACTICAL TEACHER."
"The preface states that this book 'is intended to supply a
want much felt by Teachers at the present day-the production
of a work which, while giving the unrivalled original in all its
integrity, would also contain the modern conceptions and developments of the portion of Geometry over which the elements
extend.'
" The book is all, and more than all, it professes to be.... The
propositions suggested are such as will be found to have most
important applications, and the methods of proof are both simple
and elegant. We know no book which, within so moderate
a compass, puts the student in possession of such valuable results.
" The exercises left for solution are such as will repay patient
study, and those whose solution are given in the book itself will
suggest the methods by which the others are to be demonstrated.
We recommend everyone who wants good exercises in Geometry
to get the book, and study it for themselves."
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