Chemical Analysis of Metallic Worls of Art, S^-c. 301 



1. Fragment of a Chain, foutid along fvith different weapons at 

 Ronncburg, probably an ancient field of battle. — It contained 

 82.5 copper, and 17-5 zinc ; = 100.0. 



2. Fragment of an Armlet, found in a grave near Naumburg, in 

 Thuringia.— It afforded 1.538 tin, 15.384 zinc, and 83.077 

 copper ; = 99.999. 



3. Fragment of a Bronze Urn, from a grave in Liefland. — It 

 contained 4-78 tin, 7-50 zinc, 88.66 copper, and 1.05 silver; 

 = 100.0. 



4. A well preserved Arrow-Head, from an Egyptian grave. — It 

 contained 22.02 tin, and 77.60 copper ; = 99.62. 



6. Roma?t Silver Coin of the Sixth Consulate of Trajan, foufid 

 in a grave at Massel, in Silesia. — It contained 90. silver, 9. 

 copper, and 1. gold ; = 100. 



6. A Greek Coin, found in Silesia CAv : cap. galeat barbat. — 

 Rev.: tropaum, Sfc.J. — It contained 1.25 gold, 84.10 silver, 

 14.00 copper ; = 99.35, 



7. Fragment of an ancient cast Sarcophagus.~-lt contained 

 19.66 tin, and 80.27 copper ; = 99.93. 



8. Fragmetit of an ancient cast Sarcophagus. — It contained 

 26.74 tin, and 73.00 copper ; =99.74. 



Schweigger, SeideTs Journ. 1831. 



2. On the Change of Arragonite into Calcareous Spar. 



Berzelius has given a very simple method for distinguishing 

 calcareous spar from arragonite. The arragonite, when brought 

 nearly to a red heat, swells, exfoliates, and lastly, forms a 

 powdery slightly coherent mass. If we put a fragment of cal- 

 careous spar and a fragment of arragonite in the same glass 

 tube, and heat both, so that they attain the same degree of heat, 

 wc observe no change in the calcareous spar, while the arrago- 

 nite has fallen into powder. ] grains of arragonite were heated 

 in the common apparatus used for determining the smallest 

 quantity of gas, it gave out, during its falling into pieces, uo 

 gas whatever. The change induced on arragonite by heating 

 is not, therefore, owing to any chemical change which has taken 

 place in it. This appearance is consequently of the same de- 

 scription as that of the change of the crystals of melted sulphur 

 at the common temperature ; the particles of the carbonate of 

 lime arrange themselves in a different manner from what is the 

 case in arragonite, and undoubtedly as in calcareous spar. It 



