CRYSTALLIZATION OF GOLD IN HEXAGONAL FORMS. 345 
» reducing gold with ether, phosphorus in ether, oxalic acid, ferrous 
sulphate etc. 
The occurrence of gold in prismatic and hexagonal forms has © 
been observed by others: Prof. W. P. Blake describes Crystallised 
— Gold in prismatic forms—(Am. Jour. Sci., Vol. xxvii, 1884.) 
From near Clancy, Clancy Creek, Jefferson County, Montana, 
were obtained prismatic crystals of gold terminated by an octo- 
hedral head or knob, the whole having a comet-like appearance. 
The total length is about 3 m.m. or } inch, the prism portion is 
hexagonal in section. (Figures are given in the paper). They 
are extremely brittle, and appear to cleave or break at right 
angles to their length. Hence probably an alloy or amalgam. 
Small brilliant hexagonal crystals of gold, terminated at each 
end by pyramids, were found at Sonora, in Tuolumne County, 
California, and they resemble the artificial prismatic gold crystals 
obtained by Prof. Chester (Am. Jour. Sci., July 1878). It is 
possible that these crystals are also artificial, although similar 
erystals obtained at Angel’s Camp in the same district were said 
to have been obtained from a cavity in quartz, but Prof. E. 8. 
Dana in a paper on the Crystallisation of Gold from White Bull 
Mine—(Am. Jour. Sci., Vol. xxx11., p. 132), points out that the 
rhombohedral and hexagonal pyramid forms are due to planes of 
the 303 which are elongated in the direction of the octohedral axis. 
In another paper On the Crystallisation of Gold—(Awm. Jour. 
Sci., August 1886, p. 138.) Prof. E. 8. Dana refers to hexagonal 
depressions in gold crystals and of crystalline ribs meeting at 60° 
and 120°, which are also quite consistent with the cubical system. 
Prof. vom Rath in Groth’s Zeitschrift fiir Krystallographie und 
Mineralogie 1877, describes some crystals of gold from Transyl- 
vania, and amongst them a star like formation from Felsé-banya, 
each ray being a twin of the four faced cube (0 O2) round a 
trigonal axis and extended along the diagonal of a face of the 
octohedron. He states that the acicular and capillary forms are 
usually rhombic in section, and consist of elongated cubes termin- 
