: IL. 
Arsenic, - - . 29°25 | 29°48 
Copper, - - - 10-68 70°01 
99°93 99°59 
4. Copperglance pseudomorphous after galena (Harrisite, Shepard.) 
. 
When I pronounced harrisite to be a pseudomorph of Hi 2 
glance after galena, (this Journ., [2], xxiii, 415,) I little though 
that soon after, by the discovery of Dr. John Torrey (who ee t 
municated to me specimens from the Canton mine, Georgia, = 
containing a nucleus of unaltered galena, noticed by Prof. Bru 
in the 9th supplement to Dana’s Mineralogy), my suggestion & 
would be seoved to be a positive fact. am 
received about one year ago from a new locality seve 
— of this interesting pseudomorph from the discoverel, 
lexander Trippel, Esq., Superintendent of the copper works 2 
Pol county, Tenn . They occur at the East Tennesse? 
mine, Pol county, in a feldspathic rock, associated with 
copyrite, nde, garnet and lime-epidote ( 0. 9 
several pieces and confirmed by the analyses. 
results were obtained: 
ucieus o a. 
Lead, 84:33 12°55 11°38 2°85 107 
Silver, O72 0-5 O73 t1 0 
Copper, 0-94 66:27* 67-45 14-90% 76-40 
Tron, 05 9°40 0-4 65 
‘Sulphur, 1427 20°17 20°04 20°75 20°60 
Selenium, trace trace trace trace trace 
Quartz, ee cil eine Te oll 
100°46 100-00 10000 10000 99°03 
- ‘The rational composition of the above analyses would be: 
i * From the loss, 
