ANALYSES OF DOLOMITES 
351 
2. Specimen from Grossachenthal, near St. Johann, Tyrol, 
Austria. It is a grey, compact, non-crystalline variety. 
PER CENT 
S 1 O 2 0.20 
Fe 2 Os 0.85 
AhOs 0.00 
CaCOs 53,62 
MgCOs, 45.31 
Total................ .................. 99.98 
The specific gravity is 2.84. The specimen is quite a typical 
dolomite. 
3. Specimen from Andrian, Ueberetsch, Tyrol, Austria. It 
is a white, granular rock, resembling marble. 
PER CENT 
S 1 O 2 1.10 
Fe 2 Os ........ ........................ 0.58 
AI 2 O 3 .................................... 0.00 
CaCOs . . 54.45 
MgCOa 44.84 
Total................ .................. 99.97 
The specific gravity is 2.71. The specimen is almost a typical 
dolomite. 
4. Specimen from St. Martin, Tyrol, Austria. It is a pure 
white crystalline variety, resembling marble. 
S 1 O 2 
KcsOs 
AhOs 
CaCOs ... 1 ............ . 
MgCOa 
Total. ............... 
PER CENT 
. 0.20 
. 0.60' 
. 0.00 
. 51.91 
. 47.52 
.100.23 
5. Specimen from Munknerbach, Tyrol, Austria. It is a pink, 
massive variety, of a pearly luster, and also contains transparent 
crystals. 
PER CENT 
S 1 O 2 0.48 
Fe 2 Os .................. .................. 0.35 
AhOs 0.00 
CaCOs 53.21 
MgCOs .................................. 45.91 
Total............ 99.95 
The specific gravity is 2.75. It is a fairly typical dolomite. 
6. Specimen from Pinegal, near Bozen, Tyrol, Austria. It is 
a pure white crystalline mineral, resembling marble. 
S 1 O 2 . . . 
Fe 2 Os . . 
AhOs . . 
CaCOs . 
MgCOs 
Total 
PER CENT 
. 0.70 
. 0.60 
. 0.00 
. 84.03 
. 14.76 
.100.09 
