PUBLICATIONS OF THE EOYAL IRISH ACADEMY. 



TRAE'SACTIONS : Quarto, hoards ; or in parts, stitched. 



Yols. I. to XXIII. {some out ofjjvinf). For Prices, &c., inquire at the Academy. 

 Yol. XXIY.— Science (complete), 31s. Qd. 



PoiiTE LiTEBATTJUE (complete), OS. I ^^g^^j^^^ 24.. 



,, Antiquities (complete), 19s. Qd. ) 



Yol. XXY.— Science (complete), 37s. Qd. 

 Yol. XXYI.— Science. Parts 1 to 7, 14s. 



*^* The foUowing are PARTS LATELY PUBLISHED, and may be obtained 



gratis by Members, on application : — 

 Yol. XXYL— (Science) :_ 



Part 8. — On a new Species of the Genus Chlorochytrium. By E.'Pee- \ 

 CEVAL Weight, M.D. (Plates lY. & Y.) [PubUshed August, 1877.] \ ^^ g^ 



Part 9. — On Chytridia occurring in the Cells of Ectocarpi. By E. i 

 Pekceval "Weight, M.D. (Plate YI.) [Published August, 1877.] / 



Part 10. — A Supplement to Sir John Herschel's " General Catalogue of Nebulte 

 and Clusters of Stars." By J. E. L. Dkeyee, M.A., F.R.A.S. 2s. 



Part 11. — On the Aspect of Mars at the Oppositions of 1871 and 1873. By 

 C. E. Burton, B.A. (Plates YIL & YIII.) Is. 



Part 12. — Direct Demonstration of the Properties of the First Negative Pedal 

 of a Central Conic from any Point in its Plane. By John C. Malet, M.A. Is. 



Part 13. — On the Intersections of Plane Curves of the Third Order. By 

 Andeetv Seaele Haet, LL.D. Is. 



Part 14.— On a Proof that every Algebraic Equation has a Root. By •, 

 JOHN C. Malet, M.A. , 



Part 15. — On a Certain Surface derived from a Quadric. By John C. i 

 Maxet, M.A. ) 



Part 16. — Attempt to deduce the General Laws of the Yariations of Tempera- 

 ture at the Earth's Surface from those of Solar and Terrestrial Radiation. By 

 the Rev. H. Lloyd, D.D., D.C.L., Provost of Trinity College, Dublin. Is. 



Part 17. — Report on the Acanthology of the Desmostieha (Haeckel). Part I. — 

 On the Acanthological Relations of the Desmostieha. By W. H. Mackintosh, B.A. 

 (Plates IX., X., XL) Is. 



Part 18. — On the Cell- structure of ''Griffithsia setacea (Ellis), and on the Deve- 

 lopment of its Antheridia and Tetraspores. By Edw. Peeceyal Weight, M.A., 

 M.D., F.L.S,, F.R.C.S.I. (Plates XII. & XIII.) [PubUshed November, 1878.] 



Part 19.— On the Formation of the so-called "Siphons," and on the Develop- 

 ment of the Tetraspores in Polysiphonia. By Edwaed Peeceval Weight, M.A., 

 M.D., F.L.S., F.R.C.S.I. (Exam.) (Plate XIY.) [PubUshed November, 1878.] 



Yol. XXYII. (Polite Lit. and Antiquities) : — 



Part 1. — On the BeU of St. Patrick, caUed the Clog an Edachta. By William: 

 Reeves, D.D. [PubUshed March, 1877.] Is. 



Part 2. — On an Ogam Monument in the County of Kerry. By the Right 

 Rev. De. Geaves, Lord Bishop of Limerick. [Published November, 1878.] 



\_For continuation of List of PxiUicatioiis, see page iii. of this Cover.'] 



