208 Reéxamination of American Minerals. 
traced by Prof. Silliman, Jr., in connection with the corundum 
occurring in various parts of this country. Its constant occur- 
rence with emery and corundum (forming one of the minerals of 
elimination in their formation) suggested the name emerylite as 
most appropriate, its composition having been found to be differ- 
ent from that of any known mineral. 
It was justly considered an interesting species, on account of 
its accompanying the various forms of corundum wherever ob- 
served; and it may be safely said, that no mineral has been proved 
to be as widely distributed in so short a time after the first an- 
nouncement of its connection with the emery of Asia Minor, and 
the suggestion that it might be found with the corundum of other 
localities. ; 
The analyses which were immediately made of this mineral by 
different chemists, on specimens coming from various parts 0 
the world, showed a uniformity of composition most remarka- 
ble in a micaceous mineral, and so it was considered by a com- 
mittee of the Academy of Sciences at Paris, who reported on this 
subject.* This fact is most clearly seen by reference to the fol- 
lowing table of analyses made in 1850. 
a : inieaen ee) ae Te eee 
LOCALITIES. Si | Al] Ca; Pe | Me (kK & Nal H| Mo 
Gumuch-dagh, —_—|99-66|50-88|13-56, 1-78 | 050 | 150/341; —— J. L. Smith 
Island of Nicaria, |30-22|19-67/11-57, 1-33 | trace | 2-31 |512) —— ie 
‘ 29-87) 18-48/10°84; 1-63 | trace | 286 4:32] ——| .“ 
Island of Naxos, — |30-02 49-52/10°82 165 048 1-95 (5°55) ——— x 
iN . 28-90/48-53/11-92| 0-87 [not est’ed/not ested 9°08} —— . 
“ —}3010/50-08/10-80!not estied) at eee Ca 
Gumuch-dagh, 30-90] 18-21) 9-53} 281 “ 461] ——|> 4 
aa % 31-93 18-80} 9-41) 150° | « 3-62| trace | 6 
iberia, 28:5(/5)-02/12-05} 1-78 “ — /notest’ed 5-04} —— 
Village Green, Pa. /32-3) 10.34 1066, —— | 030 | 221 ——— |W.J.Craw 
. 31-06/51-20; 9-24; —— | 098 | 297 — 
re 3160/10) — | 050 | 1 427; —— Z 
‘ -18/51-40)10-87; ——~ | O72 | 277 /452} ——| 
Buncombe Co.,N.C.|29-17/43-40| 9-87), —~ | 124 | 615 {3-99 F203 Silliman, 
Unionville, Pa.,  /29-99/50-57|11-31| —— | O62 | 2 514 — |W.) Cam 
“ 32:15154-28111-36' trace | 0:05 ‘notest’ed'0'50| —— 'Hartshom™ 
It ‘was suspected by us, at the time the species was an 
that it might prove identical with margarite, but not having 
latter mineral at hand, we had to proceed on the known ana! 
of it which we here give. The Ist is by Dumeril; the seco? 
by the Géttingen Laboratory on the authority of Hausmann. 
a 
Si Al Fe m 
1. 8700 = 4050 4°50 896 1-24 1-00=98'20 ; 
% 33°50 58-00 4a 1-50 0-03 preiet 
analyses differing so materially from those of emery’ 
These 
fully justified the formation of the species. sae 
s soon as margarite could be procured, it was subjectl 
analysis and the inaecuracy of former analyses proved ; but ' 
* O .. 6 Vivntn' Ans! Cataninen Dek 2th: 1850 * 
