JUNE, 1890.] 
PUBLICATIONS 
OF THE 
EOYAL lEISH ACADEMY. 
♦ 
TRANSACTIONS: 
Quarto, Boards; or in Parts, stitched. 
Vols. I. to XXVIII. {some out of print.) 
Vol. XXIX. (Science.) 
PART 
1. — On the Plane Sections of the Cylindroid. Being the Seventh Memoir on the Theory 
of Screws. Ey Sm Egbert S. Ball, LL.D., F.E.S. (With Plates I. and II.) 
Price 3s. (December, 1887.) 
2. — On the Ogham Monument at Kilcolman. By the Eight Eev. Dr. Graves, Lord 
Bishop of Limerick. Price l5f. (December, 1887.) 
3. — On Two-Nosed Catenaries and their application to the Design of Segmental Arches. 
By T. Alexander, C.E. ; and A. W. Thomson, B.Sc, Assoc. Mem. Inst. C.E. 
(With Plate III.) Price 3s. (November, 1888.) 
4. — The Brain and EyebaU. of a Human Cyclopian Monster. By D. J. Cunningham, 
M.D. (Edinb. et Dubl.) ; and E. H. Bennett, M.D. (With Plates IV. and V.) 
Price Is. U. (November, 1888.) 
5. — On the Theory of the Content. By Sir Egbert S. Ball, LL.D., F.E.S. Price 
2s. 6c?. (January, 1889.) 
6. — The Tripartite Life of St. Patrick : New Textual Studies. By the Eev. B. 
Mac Carthy, D.D. Price Is. (May, 1889.) 
7. — Geometrical Illustrations of Newlands' and Mendelejeff's Periodic Law of the Atomic 
Weights of the Chemical Elements. By the Eev. Samuel Haughton, M.D. 
(Dubl. et Bonon.), D.C.L. (Oxon.), LL.D. (Cantab, et Edinb.) Price 25. 
(June, 1889.) 
8. — The Eighth Memoir on the Theory of Screws, showing how Plane Geometry Illus- 
trates General Problems in the Dynamics of a Eigid Body with Three Degrees of 
Freedom. By Sir Egbert S. Ball, LL.D., F.E.S. (With Plate VI.) Price 
Is. U. (June, 1889.) 
9. — The Focal Circles of Spherical Conies. By the Eight Eev. Dr. Graves, Lord 
Bishop of Limerick. Price Is. (July, 1889.) 
10. — On Three Similar Figures, with an Extension of Feuerbach's Theorem. By 
William S. M'Cay, M.A., F.T.C.D. Price Is. (July, 1889.) 
11. — On the Motion of a Particle, and the Equilibrium of Flexible Strings on a Spherical 
Surface. By T. Preston, M.A. Price Is. (July, 1889.) 
12. — The Pectoral Group of Muscles. By Bertram C. A. Windle, M.A., M.D. (Dubl.) ; 
Professor of Anatomy, Queen's College, Birmingham. Price Is. (November, 1889.) 
13. — Markree Observations of Double Stars. ^ By W. Dgberck, Ph.D., M.E.I.A., 
F.E. Met. S., Member of the Astronomischen, and Corresponding Member of the 
Deutschen Meteorologischen Gesellschaft, Corresponding Member of the Societe 
des Sciences Naturelles de Cherbourg, Officier de I'Ordre du Dragon d'Annam, 
Director of the Hong-Kong Observatory. Price Is. (March, 1890.) 
For Farts of Vols. XXVI. to XXVIIL, see page 5. 
