SILVEU COINS. 405 



15. A Spanish dollar, dated 1801. It weighed 415.1(5 gr. Spanish dollar, 

 Its' specific gravity was lO.Spi. S.Tcopper 



1. 

 Muriate of silver, 490.33 gr.=:370.6"9 silver 



Copper 42.29 



Gold 0.29 



Loss 1.89 



415A6 



16. A Danish 60 schilling piece, dated 1789. Obverse, the Danish coin : 

 head ot the king of Denmark, with the inscription, Christi- ^'J^ Y '^^' ^^^' 

 amis VII. D. G. Dan. Norv. V. G. Rex. JRcverse, the arms 

 of Denmark, with the words, 60 Schelling. Schlesrv. Hoist. 

 Courant. It weighed 444.55 grains. Its specific gravity was 

 110.2C6'7, I received it from Professor Jameson, who brought 

 it from Germany. 



Muriateof silver, 516.98 gr. =390. 63 silver 



Copper 53.^8 



Gold 0.09 



Loss » .15 



444.55 



17. A Roman denarius at the time of the republic. Oh- Roman dena- 

 %'erse, the head of a warrior-. Reverse, Diana drawn in a car ii,"» = 

 by two stags; below, a crescent, and the word Roma. It purr "^"'^^ 

 weighed 6O.O6 grains. Its specific gravity was 10.4^3. I re- 

 ceived this, as well as the following coin, from the collection of 

 Francis Farquharson, Esq. of Haughton. 



Muriate of silver, 78.94 gr.=59.(58 silver 



Gold. 



0.29 



Copper, by estimate O.09 



60.06 



The presence of copper was rendered manifest when the last 

 solution was concentrated and mixed with ammonia. But I 

 could not succeed in separating and weighing it. • 



28. A 



