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GEOMETRY AND EUCLID.

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ALLMAN.—GREEK GEOMETRY FROM THALES TO EUCLID.By G. J. Allman.8vo., 10s. 6d.

BARRELL.—ELEMENTARY GEOMETRY.By Frank R. Barrell, M.A., B.Sc., Professor of Mathematics, University College, Bristol.

Section I.Part I., being the subject-matter of Euclid, Book I.Crown 8vo., 1s.

Section I.Part II., containing the subject-matter of Euclid, Book III. 1-34, and Book IV. 4-9.Crown 8vo., 1s.

Section I. complete.Crown 8vo., 2s.

Section II., containing the remainder of Euclid, Books III. and IV., together with the subject-matter of Books II. and VI.With explanation of Ratio and Proportion, Trigonometric Ratios and Measurement of Circles.Crown 8vo., 1s. 6d.

Sections I. and II. in one volume.Crown 8vo., 3s. 6d.

Section III., containing the subject-matter of Euclid, Book XI., together with a full treatment of volume and surface of the cylinder, cone, sphere, etc.Crown 8vo., 1s. 6d.

Sections I., II. and III. complete in one volume.Crown 8vo., 4s. 6d.

CASEY.—Works by John Casey, LL.D., F.R.S.

THE ELEMENTS OF EUCLID, BOOKS I.-VI. and Propositions, I.-XXI. of Book XI., and an Appendix of the Cylinder, Sphere, Cone, etc.With Copious Annotations and numerous Exercises.Fcp. 8vo., 4s. 6d.Key to Exercises.Fcp. 8vo., 6s.

A SEQUEL TO THE ELEMENTS OF EUCLID.Part I.Books I.-VI.With numerous Examples.Fcp. 8vo., 3s. 6d.

A TREATISE ON THE ANALYTICAL GEOMETRY OF THE POINT, LINE, CIRCLE AND CONIC SECTIONS.Containing an Account of its most recent Extension.Crown 8vo., 12s.

HAMILTON.—ELEMENTS OF QUATERNIONS.By the late Sir William Rowan Hamilton, LL.D., M.R.I.A.Edited by Charles Jasper Joly, M.A., Fellow of Trinity College, Dublin.2 vols. 4to. 21s. net each.

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