from the Museum of the Royal Irish Academy. 



315 



the ends of the ornaments supposed to be diadems, in the Academy Museum. 

 Locality unknown. It was of nearly the same colour with No. 4, and its 

 specific gravity, 15-306. 



No. 7. Specimen of supposed Celtic ring-money. It consisted of a bit of 

 gold wire, of about three-fourths of an inch long, and nearly an eighth of an 

 inch in diameter, bent into a circle, the ends being quite close, but not fastened 

 to each other. It has been stated by Sir William Betham* that the weights 

 of these rings used for money were graduated with reference to the unit of 

 twelve grains, or half a pennyweight, Troy. This specimen weighed 62'13 

 grains, or 2dwt. 12grs., five of Sir W. Betham's units, and 2'13grs. over. Co- 

 lour about the same as No. 5. Specific gravity, 17-258. 



No. 8. Another specimen of ring-money. It was rather larger than No. 7, 

 but composed of thinner wire. The colour was very much the same with the 

 last, and specific gravity, 16'896. Its weight was 30'04 grains, which is ex- 

 ceedingly close to Idwt. Ggrs., or two and a half of Sir W. Betham's units. 

 Hence it was about half the weight of No. 7. The localities where these spe- 

 cimens were found are not known. 



The results of the analysesf of the gold ornaments were as follow: — 



We observe here considerable diversity of composition, and on the whole 



* Transactions of the Royal Irish Academy, vol. xvii. Antiquities, p. 7. 



t The process of analysis calls for no particular remark, except that the gold was precipitated 

 from the solution made nearly neutral by evaporation, by adding (hot) a slight excess of sulphate 

 of ammonia, which re-agent throws down the metal in the form of a compact sponge, and does 

 not produce the effervescence occasioned by oxalic acid. 

 VOL. XXII. 2 T 



