Analyses of Ancient Alloys. 91 



Copper Coin of Athens. 

 Weight =89-5 grs. Specific gravity =8-61. Obverse: Head 

 of Minerva. Reverse : A naked figure, represented in the act of 

 hurling a thunderbolt. Metal very hard. For analysis vide Table. 



Egyptian. Ptolemy IX. About B.C. 70. 



Auletes (The Flute-player). 



This coin was made of a very brittle metal, and weighed 337 grs. 



On one side it bore the impression of a bearded head, and on the 



other an eagle holding a thunderbolt. Specific gravity =8*81. For 



analysis mde Table. 



Pompey. First Brass. B.C. 63. 



Weight, 309 grs. Specific gravity, 8*70. Obverse : Head of 

 Janus. Reverse : Prow of a ship. 



This coin was evidently cast, and the metal is very hard and 

 brittle, resembling in this respect the alloy employed in the original 

 as, before its reduction in weight. For analysis vide Table. 



Coin of the Atilia Family. B.C. 45. 

 This coin bears, on one side, the head of Janus ; and on the other 

 the prow of a ship, with the word Roma beneath it. The metal is 

 extremely hard and brittle, but has been struck with a die. Weight 

 = 466 grs. Specific gravity = 9*02. For analysis vide Table. 



Julius and Augustus. About B.C. 42. 

 Weight, 342 grs. Specific gravity, 8-64, For analysis vide 

 Table. 



Augustus and Agrippa. B.C. 30. 

 Conquest of Egypt. 

 Weight, 238 grs. Specific gravity = 8-65. 

 This coin bears two heads on one side ; and on the other a croco- 

 dile, with Col: Nem. Metal very hard and brittle. For analysis 

 vide Table. 



Large Brass of the Cassia Family. About B.C. 20. 

 Weight 365 grs. Specific gravity =8*52. 



Metal of a yellow colour, and softer than any of the foregoing. 

 For analysis vide Table. 



B. 



Analyses of Ancient Arms and Cutting Instruments. 



It would be impossible to determine the dates of these relics of 

 former times with the same accuracy with which we may ascertain 

 the ages of coins ; and I shall therefore merely give the weight and 

 dimensions of the various specimens which have been examined, and 

 endeavour to adduce such evidence as may shew their great anti- 

 quity, without attempting to specify the precise dates at which they 



