— xuv — 



Rayleigh. On the Infinitesimal Bending of Surfaces of Revolution. — Westropp Roberti. A geo- 

 metrica! Eepresentation of a System of two Binary Cubics and their Associated Porms. — Roberts. 

 On Tangents to a Cubie forming a Pencil in Involution. — Spoiliswoodc. On the Pelar Planes of 

 Four Quadrics. — Scoti. On some Porms of Cubie Determinants. — Greenhill. On the Flow of Vis- 

 cous Liquid in a Pipe of Cbannel. — Cayley. Note on Landen's Theorem. — Grifftlhs. On Professor 

 Cayley's Paper. — Lamb. On the Oscillations of a Viscous Spheroid. — Walker. On the Covariant 

 Locus of the Vertex of a Pencil of Tangents to a Cubie in Involution. — Wolstenholnie. Complete 

 Determination of the Eeal Foci and of the Vector Equation, of the Pedal of a given EUipse with 

 respect to any proposed Point. — Id. Determination of the Foci of the Pedal of a given Parabola 

 with respect to any proposed Point; and Investigation of different Forms of the Vector Equation of 

 the Pedal. — Hamynond. On the Calculation of Symmetric Punctions. — Jefferey. On certain Quartic 

 Curves having a Tacnodo at Infinity at which the line at Infinity is the multiple Tangent — Wool- 

 sey Johnson. Systems of Formulae for the sn^ cn, and dn of u-i-v-+-\v. ■ — Taylor and Rowe. Note 

 on a Geometrical Theorem. — Wilkinson. Some Elliptic Function Formulae. — !d. On the Addition 

 Equations for the Elliptic and Theta Functions of the Sum of n Arguments. — Lloyd Tanner. On 

 the Coordinates of a Piane Curve in Space. 



+Proceedings of the royal Irish Acaderay. Science. Ser. 2* Voi. TU. n. 7, 8. Polite lit. 

 and ant. Ser 2" Voi. II. u. 3. Dublin, 1881-82. 8.° 



II. 3. Leith Adams and Kinahan. Abstract of Eeport of the Exploration of Ballynamintra Cave, 

 Cappagh, near Dungarvan. — Abraham. On a Model of a Human Face frora an Island oif the East 

 Coast of New Guinea. — Id. On a Collection of Crania and other Objects of Ethnological interest, 

 from the South-West Coast of Africa. — Ferguson. On the Doorway of the Eound Tower of Kil- 

 dare. • — Frazer. A Descriptiou of a Himyaritic Seal engraved on Sand, and on a Small Collection 

 of Babylonian Inscribed Cylinders. — Doherty. The Abbey of Fahan. — Knowles. Pre-historic Imple- 

 ments found in the Sandhills of Dundruin, County Down. — iii. 7. Burton. On Halos and Anthe- 

 lia. — Knott. Abnormalities in Human Myology. — Ball. Preliminary Note on the Piane Eepresen- 

 tation of Certain Problems in the Dynamics of a Eigid Body. — Id. On Homographic Screw Sys- 

 tems. — Kinahan. Eeport on the Clearing of Peaty Waters (Part I). — Ihdges. Eeport on an In- 

 vestigation of the Character and Chemical Constitution of the Fibre of the Flax Plant. — Dreyer, 

 The Instruments in the Old Observatory at Peking. — Hardman. Preliminary Eeport on Sóundings 

 taken in Lough Gill, Sligo. — Kinahan. Eeport on the Eocks of the Fintona and Curlew Mountain 

 Districts. — Windle. Preliminary Eepovt on the Embryology of the Mammalian Muscular System. — 

 III. 8. Reilly. On a Eelation to be established between Coastliiie Directions represented by Great Cir- 

 cles on the Globe and certain Localities in Europe markedby frequency of Earthquakes. — Westropp 

 Roberls. A Geometrical Eepresentation of a System of two Binary Cubics and their Associated Forms.— 

 Stewart. Eeport on the Botany of the Mountainous portion of Co. Fermanagh to the west of Lough 

 Erne, and the adjoining district of Co. Cavan. — Balkwill and Wright. Eecent Foraminifera of Du- 

 blin and Wicklow. — Ghurch. On the Constitution of the Native Phosphates of Aluminium. 

 "i'Procedings of the royal Society of Edinburgh. Session 1880-81. Edinburgh, 8.° 



SchùUze. On the Structure of Euplectella. — Sang. On Equidifferent Multiples of Irrational 

 Quantities. — Macfarlane. Algebra of Eelationship. Part II. — Ailken. On Dust, Pogs, and Clouds. — 

 Sang. Solar Eclipse,- 31st december 1880. — Sydney Marsden. On the Preparation of Adamantine 

 Carbon or Diamond. — Blyth. Note on an Electric Sonometer. — Haycraft. Theory to account for 

 certain movements exhibited by low forms of Animai Life, and termed Amoeboid. — Gray. On the 

 Effect of Permanent Elongation on the Specific Eesistance of Wires. — Dott. Meconic Acid. — Syd- 

 ney Marsden. On the Chrystallization of Silica from Fused Metals. — Lelts. On Phosphorus Betai- 

 nes. — Lelts and Collie. On the Action of Haloid Compounds of Hydrocarbon Radicals on Phosphide 

 of Sodium and on the Salts of Tetra-Benzyl-Phosphonium. — Sang. Notice of an Easy Method for 

 determining the Position of the Principal Focus of an Object-Glass. — Tait. Note on the Tempe- 

 rature Changes due to Compression. — Herdman. Preliminary Eeport on the Tunicata of the " Chal- 

 lenger " Expedition. Part III. — Geddes and Beddard. On the Histology of the Pedicellarise and the 

 Muscles in Echinus sphcera, Forbes. — Forbes. Additional Note on an Ultra-Neptanian Planet. — 



