18 
M. Bonsdorff on Bed Silver Ore^ ^c, 
of their sulphur. The metals were then separated by cupella- 
tion. The mineral contained 
Silver, 
58,949 
Antimony, 
22,846 
Sulphur, - 
16,609 
Gangue, 
0,299 
98,703 
The two metals exist in such proportions that they occupy equal 
quantities of sulphur, that is, 3AqS^-p2SbS^. 
P. S. M. P. Strom, a Norwegian mineralogist, has analysed 
and described a new mineral species, from Eger, in Norway. It 
consists of 
Silex, 
- 
54,27 
Oxide of Iron, 
- 
34,44 
Soda, 
- 
9,74 
98,45 
He proposes to call it Wernerine-i after the celebrated Werner, 
since what has been called Wernerite^ is nothing more than 
Amorphous Paranthine. 
M. Mitscherlich has comminiicated to the Academy of 
Sciences of Stockholm his important dissertation on the Identity 
of Form of the Phosphates and Arseniates. This memojr con« 
tains, first, a crystallographic exposition, and afterwards a series 
of experiments, which prove, that the ai'senic and phosphoric 
acids give, with the same bases, analogous combinations, which 
contain at the same time an equal number of atoms of water. 
The analogous combinations affect also entirely the same crys- 
talline form. This important fact is an incontrovertible argu- 
ment against the idea of M. Hauy, that the geometrical form 
of a combination is the most essential character for determining 
mineral species ; for we cannot consider, for example, the neu- 
tral phosphate of any base as the same mineral species with 
the neutral arseniate of the same base. 
Stockholm, ) 
Aug\ 2. 1821. i 
