20 Essaij upon the Art of the Foundry 



though my most sensible re-agent for that acid (being the 

 soUition of mild nitrate of mercury) would have announced 

 even -sro'-o-r-o'^th of a grain of that acid. But 1 obtained by 

 turnsole paper some traces of an acid which certainly was 

 neither muriatic, sulphuric, carbonic, nor phosphoric acid, 

 since the most sensible re-agents for these acids, which far 

 surpass turnsole paper, did not announce them : it wan 

 therefore, in all probability, nitric acid ; I always obtained 

 traces of an alkali, which, after all my experiments, was 

 ammonia. I therefore still adhere to my opinion, that the 

 acid and the alkali are formed at the expense of the azote 

 inherent to the water, on the one side by oxygen and on 

 the other by hydrogen. 



V. Essay upon the Art of the Foundry among the An- 

 iumts : with some Remarks upon the celebrated Horses of 

 Chio, now brought from Venice to Paris. By M. Seit,z. 



[Continued from vol. xxviii. p. 354.] 



History of the Horses of Chio, and some Olscrvatlons upon 

 the Oiieslion of what School they belong to. 



J- HIS medal of Nero (Plate I.) -was struck upon the oc- 

 casion of the victory gained by Corbulon over Tiridates, 

 king of Armenia. It represents a triumphal arch surmounted 

 by a quadrigae, the horses of which have always been re- 

 garded as identically the same horses of copper gilt, which 

 our victories have obtained to us, and which now deco- 

 rate the palace of the Thuilleries. The manner in which 

 they lift their feet and carry their heads, and indeed their 

 ■whole, attitudes, hnve greatly contributed to give weight to 

 this conjecture, Vihich has been adopted by Maffei and all 

 the Italian authors *, They have gone still further in sup- 

 s' The four hors'js of Venice are about to bs placed in the same situation, 

 a» those mentioned by the author of this memoir; they will be yoked to a 

 quadriga} which will bear the figure of ilie emperor and king^ Napoleon the 

 GJ-eat, and is to be plp.jed upon the triumphal arch which decorates the en- 

 trance of theTiiuillcrics : — this gate, with the quadrigx, are exhibited upon m. 

 fine medal struck for the purpose, and of which there is an engraving in my 

 Nisloiic Mclttliiiiinol the emperor Mapoleon. — .Vi/.'c I'H M. Miilin, 



poft 



