484 
SECOND REPORT- 1832. 
compounds are obtained, in which these two substances repre¬ 
sent the chloride of potassium in the above formula. In these 
compounds Zeise considers the aetherine to act the part of a 
base, as, according to the theory of Dumas and Boullay, it does 
in the aethers. 
This able and elaborate paper is well worthy the attentive 
perusal of the chemist*. 
Compound cyanides .—A solution of prussiate of potash 
throw r s down precipitates from solutions of barytes, lime, mag¬ 
nesia, &c. These have been investigated by Mosander, who 
has found them to consist of an atom of each of the cyanides. 
Thus the calcium salt is expressed by 
(Fe + Cy) + (Ca-J-Cy) + (Po + Cy). 
The barium salt crystallizes and contains two atoms of water f. 
Mineral Chemistry.—In the first part of this Report I have 
adverted to the several great steps by which, through the ela¬ 
borate analytical labours of Bonsdorf, Rose, Wachtmeister and 
others, several orders of minerals have been established, in 
■which many varieties, distinguished by various trivial names, and 
erected by mere mineralogists into many different species, have 
been included under one general formula. I shall insert the re¬ 
sults of the tw r o latest of these suites of analyses, by which much 
light is thrown upon two obscure classes of native compounds. 
Phosphates of lead .—Wohler showed that the native phos¬ 
phates of lead are composed of one atom neutral chloride of lead 
with three atoms subsesquiphosphate or arseniate of lead; and 
Rose, that they might contain lime and fluorine without change 
of form. Kersten has confirmed these determinations by a se¬ 
ries of analyses, of which the following Table shows the results. 
Locality. 
Specific 
Gravity. 
Chlo¬ 
ride of 
Lead. 
Fluo¬ 
ride of 
Calcium. 
Subsesqui¬ 
phosphate 
of Lime. 
Subsesqui¬ 
phosphate 
of Lead. 
Freiberg . 
6*092 
10*838 
1*094 
11*053 
77*015 
Mies, amorphous .... 
6*444 
10*642 
0*248 
7*457 
81*651 
——crystallized .... 
6*983 
9*664 
0*219 
0*848 
89-268 
Bleistadt. 
7*009 
9*918 
0*137 
0*771 
89*174 
Fncrland ............ 
10*074 
10*090 
10*069 
0*130 
• « • • 
• • • • 
0*682 
• •••it 
89*110 
89*910 
89*931 
O 
Poullaouen, crystallized 
—, amorphous 
7*048 
7*050 
* Poggendorf s Annalen , xxi. p. 506. 
o 
f Berzelius, Arsberdttelse, 1832, p. 151. 
