334 A. LIVERSIDGE. 
An additional proof of the solubility of gold in natural waters 
is given in A treatise on Ore Deposits by Bernhard von Cotta. 
Translated from the second German Edition, New York, 1870, 
p. 198, says, “the gold at Hisenberg near Corbach, Rhine, 
occurs partly in the clefts of the quartz siliceous slate in thin 
dendritic incrustations ; or (and this is the most common occur- 
rence) it encrusts the very small rhombohedrons of spathic iron, 
which are found on the limestone incrustations of the clefts; these 
consequently have the appearance of gold crystals.” 
Orville A. Derby, in a paper on Peculiar modes of occurrence 
of Gold in Brazil, (Am. Jour. Sci., Dec. 1884, p. 440) affords still 
another example of the recent deposition of gold from solution. 
In this paper an account is given of a specimen of gold on limonite 
from Ponte Grande, Sabara, Minas Geraes. The limonite is 
botryoidal, lustrous, in parts of an iridescent bronzy colour and 
in others black and brown, and on various parts of the specimen 
are minute detached films of gold; the author points out that 
these films of gold have apparently been deposited from solution 
upon the limonite, which is also a mineral of aqueous origin. 
Similar thin films of gold as thin as gold leaf are seen on the 
limonite at Mount Morgan, Queensland, and upon quartz at Oura 
near Wagga Wagga, New South Wales. 
J. Cosmo Newbery, B.Sc., in a paper Upon the Mineral Waters 
of Victoria, (Trans. Roy. Soc. Vict., 1867, p. 278) gives the 
analyses of several mineral waters, and amongst them those of 
certain auriferous quartz mines of Maldon, which are remarkable 
for the large quantity of potassium chloride present, but gold in 
solution does not appear to have been met with. He investigated 
the question of the presence of gold in the waters of gold mines; 
and found gold in mine timbers, boiler deposits, etc., but stated 
that it was difficult to make sure that the gold had not found its 
way in mechanically. Other observers also have failed to prove 
the presence of gold in solution in mine waters by chemical tests. 
Plates of copper connected with a battery were placed in mine 
waters, but although gold was found on the crust which coated 
