Localities. Silica. a Lime. stig erg aa Ms on Water. Mange 
-. : | = : 
: uch-dag | aes 29°66 | 50°88] 13°56} 1°78 0-50 1:50 be a Be ca 
Island of Nicari learia, ...| 80°22 |.4967)| 11:57} .1:33 | trace. |. 231 De earn 
Ae Mere ewan renin seer 29°87) 4868) 10°84; 163 trace, 2e6 |. 432. 
— mr Island of Wises ve.) ou O02) 49:52; FGS2 | 1°65 0-48 125 woo, 
- « ie a : : ie : not es- not @8-| 9 p.nG |} = | 
ES 98°90 | 48:53) 11 92 0:87 |. at’d timat’d! 5-08 
“ “ 3 * not es- “ . 
«e---| 30°10} 50°08} 10:80 timat’dl 3 452 a a 
Gumuch-dagh, ewes oe 30°90 | 48°21 9°53 | 281 ~ 
oe sees | S193! 48°80 941 1:50 Me 
Siberia,........+... 28°50} 51-02| 1205| 178 | “ 
60 : J. Lawrence Smith on Emery. 
Its connection with all the emerys that have come under my ob- 
servation except that of Kulah, induced me to call it Hmerylite. 
When I announced this discovery to Prof. Silliman, Jr., he 
tened to examine the minerals coming from the corundum locali- 
ties of the United States, and has succeeded i in finding the eme- 
rylite with the corundum of several localities.* The s specimen 
from Siberia on which I found this mineral is in the collection at 
the Garden of Plants at Paris, and I have also reason to thin 
that I have found it with the corundum of China 
The emerylite is lamellar like mica, the plates a are easily sepa- 
rated, oo possess a little elasticity. Sometimes it is in the form 
ass composed of very small pearly scales, which are very 
friable, Meieabling some \species of talc. ‘The plates are com- 
monly convex and concave, grouped in such a manner as to form 
a triangular prism. I have also found it massive with a mica- 
ceous structure, but be an irregular fracture ; the aspect of this 
Moree is waxy: it comes from Gu much- dach. The crystalline 
of this nharat fs is difficult to determine, but if we are per- 
fiend to judge from the streaks on the surface, and the imper- 
fect cleavage in two directions, it would appear fo belong to an 
oblique rhombic prism. 
Its color is white and lustre silvery ; the hardness taken on a 
specimen from the island of Nicaria is from 4 to 4:5. The sp. 
grav. taken on ten specimens varies from 2:30 to 3:09 ; this differ- 
elice is not remarkable in a lamellated mineral. ‘That which 
gave me the greatest specific gravity contained some small 
specks of titaniferous iron visible to the eye. Its optical proper- 
ties have not been examined, for the want of a transparent piece 
Shee 
of sufficient size and a This mineral is not attacked by 
the acids; heated before the blowpipe it emits a bright light and 
melts with great difficulty on the edges, which assume a blue 
color if touched with the nitrate of cobalt and reheated. Heate 
in a tube it furnishes water frequently having an acid reaction 
due to fluoric ac 
h 
cid. 
: e ree of several specimens sabres to analysis is 
as follow 
= ees 
GOS i= eae, 
Ree: 
