80 Improvements in Physical Science (JAN. 
(7.) Clay containing Chromium, from Mortenberg.—Its consti- 
tuents were, 
Alumina........ a “0 's "outa afte RS: 
SHIGA” se-e'rerete sos SRS UT. Ol Pe 
Oxide of chromium .......... 10 
Oxide of: WOW 's:.%ew%010%0 Fe ES 
CASE A ee a 8 
" (8.) A greenish prismatic crystallized Mineral phe, the Mines 
of Nardmark.—It is nearly related to axinite. Its constituents are 
DILiIGA eietere rerelets aitlerete a wit eee ao 
Lime. Dede awad Hew oc ee BBL 
WMitéine | abo Me bawk ors ve BUGIS 
Oxide of manganese........ 10°00 
Oxide of iron... csvvrenss FSC 
Volatile matter............ 0°30 
98°56 
(9.) Stilbite.—Its constituents were, 
ak Ses BIRO eis iain 58°0 
AMlomaiiaa, ziti baselac ttn Ghee eG 
EPL | oot) cpataboote a mpeteatecs 9°2 
Iron and manganese ........ Trace 
Volatile matter ............ 164 
Copper rate ate ce Sosa ayn. 63°334 
Toten cats Sisral hfe ne Clavels fakes 11°804 
SSSA AAU Pages a's ate (oe toro ie . 24696 
RERUEEA SS ala slayer os Tate 6 nan ao . 0-166 
100-000 
Hence it is Fe S*° + 4 CuS. 
(11.) Carbonate of Manganese and Lime. — Its constituents 
were, 
Carbonate of lime........ 0 F475 
Carbonate of manganese .... 21°00 
Carbonate of magnesia...... 4°27 
100-02 
 (12.) Pearlspar.—Its constituents were, 
PE ss at oe 5 SIDE, 29:97 
Magnesia ....... Ghee ses .. 21°14 
Oxide'of iron: wud, bid, oe S40 
Oxide of manganese........ 1°50 
Carbonic acid ........+... 44°60 
—— 
98°61 
