Two after Calcite— 
Limonite. 
As above, 5-18 
Pyrolusite. 
MnO, 
Pe = eG 
Malachite after two— 
Malachite. 
CuO, CO, + CuO, HO 
57-3 
221 + 3-85 — 70. oe 
PROFESSOR HEDDLE ON THE RHOMBOHEDRAL CARBONATES. 
Calcite. 
Ca0,CO, 
100 + 2.72 = = 7.36 
Azurite. 
2CuO, CO, + CuO, H,O 
92.4 
344 — 3.615 — Tas 6-2 

Malachite. 
5-7 

The following is very cavernous :— 
Cervantite after 
SbO, 
ey eae ar 
Cuprite. 
Cu,O 
142-8 +6 - — = 78) 

Vesuvian after 
9CaO?Si0, + 2(Fe,0, , 3A1,0,)?Si9,° 
630 
2142 + 3.4 - a 6-923 
Epidote after 
3CaO0’, SiO, + 2(Fe,0, , 3A1,0,)?Si0,° 
411 
1345 + 3.27 - 9 = 6-966 
Epidote after 
6-966 
Steatite after 
6MgO, 5Si0O, + 2H,0 
215 
576 + 2-68 - or 6-51 
VOL. XXVII. PART IV. 

Antimonite. 
Sb,S, 
340 = 4.56 — = 14.9 
Andradite, 
3Ca0?, SiO, + Fe,0,?, SiO,’ 
279 Pe es 
1016 = 3.64 — 7 = 6-975 
Andradite. 
6-975 
Scapolite. 
3CaO?, SiO, + 2A1,0,?, Sid,° 
477 
1288 + 2.7 — Ft) = 8-08 
Gehlenite. 
CaO’, SiO, + Al,O,, SiO, 
391 =~ 2-95 — —— 7-82 
509 
