334 



quadric cone, consists only of the right line pt itself, and of the osculating 

 twisted cubic to the proposed curve in space. 



XII. These are only specimens of one set (as aboye hinted) of recent 

 results obtained through quaternions ; but at least they may serve to 

 mark, in some small degree, the respect and affection, to the Academy, 

 and to yourself, with which I remain. 



My dear Mr. President, 



Faithfully yours, 



William Eowan Hamiltoi^. 



The Very Rev. Charles Graves, D. Z)., P. R. I. A., 

 Dean of the Chapel Royal, 8fc. 



The following donations were presented to the Museum : — 



1. A cinerary urn, of a peculiar form, ornamented with ribs and 

 undulating lines, forming patterns, charged with sloping straight lines, 

 made apparently with the teeth of a comb ; height 4 inches, diameter 5 J 

 inches. Presented by E. H. Prith, Esq., C. E. 



2. Three small cleft rings, from Thebes, in Egypt, composed of 

 alabaster, cornelian, and bronze, or copper plated with gold, like certain 

 cleft rings found in Ireland. Presented on the part of Arthur R. JS'ugent, 

 Esq. 



3. Pour flint arrow-heads, said to be recently manufactured at Cam- 

 bridge. Presented by P. J. Poot, Esq. 



The thanks of the Academy were returned to the several donors. 



MONDAY, MAT 11, 1863. 

 "William E. Wilde, Esq., Yice-President, in the Chair. 



On the recommendation of the Council, it was — 



Eesolved, — That the sum of £50 be placed at the disposal of the 

 Council for the purchase of antiquities, and for the arrangement of the 

 Museum, for the year 1863-64. 



The Eev. William Eeeves, D. D., read a paper " On Irish Ecclesi- 

 astical Shrines." 



Mr. E. Clibboen, with the permission of the meeting, read the fol- 

 lowing paper : — 



On the Spaeks prodtjced by the Ieon Inductioi^ Coil used by the 

 Eev. De. Callan, of Maynooth. 



Having had an opportunity given me on Tuesday, the 21st ult., by 

 the Eev. Dr. Callan, professor of natural philosophy in St. Patrick's 

 College, Maynooth, of seeing his gigantic induction electro-magnetic 

 helix in full action at his lecture on that day, and having then noticed 



