VARIKTV OF SULPIIATB OK LIME. 
379 
had been separated, being mingled with liquid aromonia, 
yielded 3'50 gr. of oxide of iron, and this being deducted 
from the product, obtained by process H, left the quaiUily of 
sulphate of lime = 114gr. 
The examination being thus completed, it is obvious that 
the mineral cannot be classed among the apatites, or native 
phosphates of lime ; but that it is a variety of sulphate of lime, 
the chemical constitution of which is as follows: viz. l£*U 
I 
parts contain 
Sulphate of lime 114 
Silex 2.r.tO 
Oxide of iron 3-50 
Magnesia 4 
Water 3 
5, Nassau Street, S>ho, 
Dec 9. 1813. 
15000 
Anahs $ of a 
fossil. 
1 
