400 . FA. Genth’s Contributions to Mineralogy. 
Art, XLVII.— Contributions to Mineralogy ; by ¥. A. GEntH. 
1. Whitneyite, a new species. 
MaAssIVE, structure crystalline, finely granular. H.=8'. Sp. 
. at 16° Cels. = 8-408. L 
B.B. it fuses readily and gives off the odor of arsenic. Insolu- 
ble in chlorhydric acid; soluble in nitric acid. Composition: 
Cu, , As. ' Analyses : 
Calculated. 
Copper, 88°07 88°19 88°37 
Arsenic, 11°81 11°41 11°63 
Silver, i : 
Insoluble, t Mee 0-47 
, 100°21 100°07 100:00 
_ of Professor J. D. Whitney, who informs me that a min fe 
which he found at the Minnesota Mine, is identical with my® 
_ In its chemical relations it is of considerable interest, on 4 
it is another example in which a multiple of six equ! 
Domeykite, hm cane ee 
Algodonite, - - ‘ 4 i eer - 
Whitneyite, . - - - Cu, g4* 
(To be continued.) 
ig 
