448 Scientific intelligence: 
The Almaden ore affords quicksilver 37-79, sulphur 16-22, iron 10:36, 
silica and alumina 35:12. The ore of Moschellandsberg, gives quick- 
silver 66°86, sulphur 11-43, — residue 17:09; and that of Wolf- 
stein, 18:00 p. c. of quicksilve 
Crystal of Native Gold. eine C. U. Sueparp describes (Proc. 
mer. Assoc., vi, 231) a crystal measuring 2ths of an inch across, 
weight 121-1 grains. Form the pentagonal dodecahedron. The edges 
are raised, asin many other California crystals of this metal. 
Gold in Pennsylvania.—Dr. C. M. WertTHERILL mentions (Trans. 
Amer. Phil. Soc., x, 350) the occurrence of gold in the earth obtained 
on digging a well : ; the exact place is not certain, but it was probably 
in Franconia township, Montgomery Co. Several rocks of the neigh- 
borhood on trial proved to contain gold in traces along with pyrites and 
magnetic iron. In the earth from the well, along with the spangle of 
gold, a white malleable particle of metal was found which gave the re- 
actions of native tin. Judging from the amount of gold obtained, one 
pme yoan® of the earth would afford 0-4 grammes of gold, worth 
Gold ‘of fede —-Specific gravity of worn froarments of gold from 
the R. du Loup, 15°761, 16-490, 16654, 17-60, 17°77. The third 
specimen after being hivomertd toa fin plate, aa poe) annealed, 
had the sp. gr. 17° 034; and the fifth after the same process, 17-848. 
These two afforded, (1) gold 86-40, silver 13-60, “(il) pen ‘8 77, sil- 
ver 12°23. A third in fine stiles; gave gold 89-24, silver 10°76; 
G. = 16°57. 
Gold in Vermont.—This volume, p. 174. 
Tridosmine and Platinum of California,—associated with a probably 
new element; Dr. F. ha Gentx, (Proc. Acad. Nat. Sci. Philad., 1852, 
209,) this volume, p. 246. 
Platinum and Iridosmine. in Canada.—-The gold washings of the 
Riviére du Loup and R. des Plantes, afford grains of Platinum ; there 
are also tin-while grains, generally hexagonal in ig which prove to 
be Iridosmine. (T.S. Hunt in Logan’s Rep., cit ce 120.) 
On the Leeper of Chondrodite ; by J. D.D na.—The chem- 
ical identity of Hum d Chondrodite is well aa but the crystal- 
lography of the two rk eh been shown to be accordant. The writer 
given in his Mineralogy (2d edit., p. 388, and 3d edit. p. 280), and 
in this Journal, vol. xlvi, fig. 6, p. 381 1 (1846), the only figure of a 
erystal of chondrodite yet published. It represents an acute oblique 
1 havi 
side > edge) — a0, Mt: :é—157°, M:é= 
a tie lngcnal edge, or plane ) ars aa over the 
he surfaces were not quite smooth and the an ngles 
were siven aS approximations only. 
Can now exhibit the resemblance to Scacchi’s figures. of age 
in “Pogg. Ann 1851, Erginz., ii, 161, and this Jour. [2], xiv, eh. ine 
hemihedral Tori of humite is is represented evidently in the chon — 
Consequently the planes M are planes of an ort 
