M. Bonsdorff on the Amphiboles^ 17 
live, or acid body 5 replace the last. It appears, from the experi- 
ments of M. Bonsdorff, that a hisilicate may be replaced, with- 
out change of form, by a trialummate^ either of the same, or of 
an isomorphous base. The memoir of M. Bonsdorff, which will 
be found in those of the Academy of Sciences of Stockholm, con- 
tains a number of results of great value in chemical mineralogy, 
but which cannot be communicated in an extract. The follow- 
ing table contains the numerical results of the analyses : 
M. Bonsdorff’s Analyses of the AmpMboles. 
Constituent 
Principles. 
From Gullfio, in 
Wermeland. 
White. 
1 From Fahlun. 
Whitish-yellow, 
1 Actinote of Ta- 
1 berg in Werme- 
1 land. Ditto, 
1 Asbestos of Ta- 
rantaise in Savoy, 
1 Black, 
From Aker, 
White, 
So 
1 
£ w 
j From Kordmark, 
Black. 
From Vogelsberg 
in Wetterau, 
Brown. 
1 The Pargasite. 
1 Translucid 
and Greenish. 
From Pargas. 
Black. 
Silex, 
60,31 
60,10 
59,75 
58,20 
56,24 
47,21 
48,83 
42,24 
46,26 
45,69 
Magnesia, - 
24,23 
24,31 
21,10 
22,10 
24,13 
21,86 
13,61 
13,74 
19,03 
18,79' 
Lime, 
13,66 
12,73 
14,25 
15,55 
12,95 
12,73 
10,16 
12,24 
13,96 
13,83 
Alumine, - 
0,26 
0,42 
0,14 
4,32 
13,94 
7,48 
13,92 
11,48 
12,18 
Protoxide of t 
Iron, ( 
0,15 
1,00 
3,9 i > 
3,08 
1,00 
2,28 
18,75 
16,26 
3,78 
7,32 
Protoxide of ) 
0,31 
Manganese, 1 
, — 
0,47 
0,21 
0,26 
0,57 
1,15 
0,33 
0,36 
0,22 i 
Fluoric Acid, 
0,94 
0,83 
0,76 
I 0,66 
0,78 
0,90 
0,41 
1,60 
1,50 1 
Water, 
0,10 
0,15 
— 
0,14 
9,50 
0,44 
. 0,50 
— 
0,61 
— 1 
Total, 
99,65 
100,01 
100,12 
100,08 
100,18 
99,93 1 
|i 
P 1 
CD 
CO 1 
98,77 
97,21 
99,53 1 
I 
Analysis of Red Silver Ore. — M. Bonsdorff has analysed 
the red silver ore, which, from the experiments of Vauquelin 
and Klaproth, was believed to be a combination of sulphuret of 
alver, sulphuret of antimony, and oxide of antimony. He has 
proved that this mineral does not contain a trace of oxigen. I n 
order to analyse it, he employed the method quoted above, 
which M. Berzelius made use of to reduce the muriate of plati- 
num ; that is, to pass a current of dry hydrogen gas over the 
ore heated in a small glass globe. From this is obtained sul- 
phuretted hydrogen gas, without a trace of humidity, and there 
remains at last a metallic button of silver and antimony deprived 
VOL. VI. NO. 11, JANUARY 1822. R 
