171 
= (2A +1, 2n+1, 2v)=0, 
If\=0, we must put 1 in place of A! in the preceding for- 
mule.” 
Sir William R. Hamilton made some remarks on Professor 
Graves’ Paper. 
Dr. Aquilla Smith presented the following donation from 
the Archdeacon of Clonmacnoise : 
1. Coloured window jen seventeen fragments :—one 
fragment in lead fitting; two fragments of lead fittings for 
glass: from the Abbey of St. Peter and St. Paul, Newtown, 
Trim. 
2. Oval silver reliquary and medal. 
: 3. Ten Italian medals in brass and copper. 
4. Two bulle; a figure representing St. Patrick ; a weight 
stamped with a heart and the letters J- B.; a square ingot or 
weight ; and a small cup: all made of lead. 
5. Two silver, one gold, and one brass brooch ; one bead 
made of white glass, with blue stripes. 
6. Three silver and four brass finger rings ; four rings, 
iron and brass. 
7. One silver and nine brass buckles, of different patterns. 
8. Three very small spoons, and two fragments of large 
spoons. 
9. A coat button with glass centre. 
10. Two ornaments and harp pin, made of brass. 
11. Two pins and portions of a comb, made of bone. 
12. One brass and seven iron keys. 
13. One old matchlock and fragment of iron chain. 
14. One small padlock and stopper for key-hole of safe. 
15. One pommel ofsword and arrow-head ; two knives and 
one large fork ; made of iron. 
