22 Clarke and Chatard—Mineralogical Notes. 
B. Broadly foliated micaceous, light grayish green, strong 
mother-of-pearl pater also associated with topaz. Ana lyses 
(Chatard) as follow 
B. 
gnhon ee er 4°48 4°78 
a is geal & 45°19 45°34 
Rigutes Pg a EES 33°32 33°96 
Ferro de - 4°25 3°96 
Manganous oxide. 0°58 0°51 
nt Sri i ag aa we we tr 0°22 
Magnesia -.-..--- 0°36 0°10 
oda 1°57 1°49 
PO. 11°06 10°73 
100°81 101°09 
? 
Ignition Sev teen. ees 
RMON Oe LE ae Lee S172 
BR i ey 50°03 
errous oxide oe aa 
SANG Lawaidt oa as ai Awe. S 11°57 
Migueea fo. AG kc, 0-12 
Alkalies r anietpaliy ay if OR ag 
100°58 
B. An altered crystal of corundum from Iredell Co., N. C., 
showing a core of corundum surrounded by a yellowish white, 
semi-micaceous, compact mineral more or less intermixed wit 
small needles of black Eatatien Analysis (Chatard) shows 
the micaceous mineral to be a margarite similar to that de- 
scribed, by Dr. F. A. Genth, as occurring at Hendrick’s Farm 
in the same county. 
SOI eo ae eas ca 5°68 
Silica -- 31°15 
ATOMS 25 Losses oe es cs 49°51 
bwt FS Week See Uae sis 11°13 
OU Morse ody ee 0°45" 
‘hikniion ere WOOR) cies 2°74 
100°66 
