1818.] the Commencement of the Year 1817. Part I. 17 



Sulphurets of 



Mercury 



Mercury 



Tin 



Nickel 



Arsenic 



Molybdenum. 



Zinc 



Cobalt 



Antimony. . . . 



Silver 



Lead 



Bismuth 



Copper 



Iron 



Authorsofthe 

 Analysis. 



Berzelius. 



Seguin. 



Berzelius. 



Proust. 



Laugier. 



Bucholz. 



Gay-Lussac. 



Proust. 



Berzelius. 



Marcet. 



Berzelius. 



Berzelius. 



Chenevix. 



Then.ird. 



Sp. Grav. 

 of the 

 Metals. 



13-599 



13599 



7-291 



8-279 

 8-308 

 7-400 

 6-861 

 8-5384 

 6-7021 

 10-4743 

 11-224 

 9-7654 

 8-895 

 7-788 



Quantity of Metal. 



By Weight: In Vol. ;sul 

 siilph. =20. = 10-05. 



125-5 

 131-26 

 73-5 

 42-55 

 27-62 

 300 

 410 

 500 

 53-69 

 135-0 

 129-5 

 86-35 

 400 

 34-5 



9-227 



9-652 



10-081 



5-140 



3-324 



4-054 



6121 



5-855 



8-011 



12-889 



11-538 



8-843 



4-497 



4-430 



Reduced toVolumes. 



Sul- 

 phur.. 



I 

 1 

 1 

 o 



3 

 5 



5 

 5 

 5 

 4 

 7 

 8 

 9 

 9 



Metals. 



orO-918 

 0-960 

 l-OOS 

 1-002 

 0-992 

 2019 

 3-045 

 2-913 

 3-986 

 5-139 

 8-036 

 7-039 

 4-02T 

 3-967 



(Ann. de Chiin. et de Ph}s. iii. 124.) 



4. Crystals of Protoxide of Lead. — M. Houton-Labillardiere 

 dissolved a quantity of litharge in soda, and set it aside during 

 the winter. It deposited white semitransparent crystals, about 

 the size of a pin-head, and having the form of regular dodecahe- 

 drons. These crystals possessed all the properties of protoxide 

 or yellow oxide of lead. — (Ann. de Chim. et de Phys. vii. 218; 

 and Annals of Philosophy, ix. 4G8.) 



5. Peroxide of Tin. — Berzelius had conceived that the oxide 

 of tin obtained from the fuming liquor of Libavius was different 

 from that formed by means of nitric acid ; but in consequence 

 of some observations of Gay-Lussac, in which he stated his 

 reasons for calling in question the diversity of these two oxides, 

 Berzelius was induced to examine the subject with more care 

 than he had formerly done. His experiments show clearly 

 enough that the two oxides contain the very same proportion of 

 oxygen ; but they exhibit differences in their chemical characters, 

 which seem to be owing to the different state of their aggrega- 

 tion, occasioned by the different modes of preparing them. The 

 oxide formed by means of nitric acid combines with sulphuric 

 acid ; but does not dissolve in that acid, whether it be concen- 

 trated or diluted ; but the oxide from the liquor of Libavius 

 dissolves in an excess of diluted sulphuric acid, and is not again 

 deposited even by boiling the solution. Nitric acid is incapable 

 of dissolving the oxide prepared by means of nitric acid ; but 

 nitric acid dissolves the oxide from the liquor of Libavius, and 

 is entirely neutralized by it. It acquires an astringent taste. 

 The oxide is not precipitated by exposing the solution to the 

 air ; but it precipitates when the liquid is raised to the temper- 

 ature of 122°. When muriatic acid is poured upon the oxide 

 prepared by means of nitric acid, it acquires a vellow colour ; 



Vol. XII. N° I. B 



