184 Royal Irish Academy. 



Monday Evening, JSTovembee 14, 1881. 



Sir Eobeet Kane, ll.d., f.e.s., President, in the Chair. 



The Secretary presented for Dr. Ball and read the abstract of his 

 Paper " On Eesearches on the Dynamics of a Rigid System moving 

 in IS'on-EucIidian Space, Part I." 



This Memoir contains the fundamental steps necessary for translat- 

 ing the Theory of Screws from the ordinary space into the Non- 

 Euclidian Space of Cayley and Clifford. 



Professor O'Reilly read a Paper '^ On a Relation to be established 

 between Coast-line Directions, represented by Great Circles on the 

 Globe, and certain localities in Europe marked by frequency of Earth- 

 quakes." 



The Secretary read for Mr. Westropp Roberts a Paper '^ On a 

 Geometrical Representation of two Binary Cubics and their Associate 

 Forms." 



The Rev. Dr. Haughton read a Paper " On the Effect of the Lunar 

 and Solar Tides in lengthening the Sidereal Day." 



Dr. Macalister exhibited one of the funereal vases which originally 

 contained some of the viscera of the Princess Ha nefer, of the XX. 

 Dynasty. This jar was under the protection of the ape-headed Genius 

 of the Amenti, to whom it is inscribed. 



Dr. Erazer exhibited a Shabti figure, the loan of which he had 

 obtained from Mr. Richard Gray, County Surveyor. Dr. Macalister 

 explained that it was the Shabti of Her-enuatas, son of Tashatat, 

 probably of the date of the XXYI. Dynasty, about b.c. 600. 



Dr. Erazer exhibited a Bronze Bracelet found some years since in 

 the West of Ireland. 



Dr. Tichborne was elected a Member of Council in place of the 

 late Alexander Carte, m.i)., e.l.s. 



The Secretary laid on the table part vi. of the 28th vol. of the 

 Transactions of the Academy — " New Researches on Sun-heat and 



