od geen 
7 ~ r 4 
’ ii 
‘g —— 
318 A. LIVERSIDGE. 
(p. 17) that in the province of Antioquia, North Granada, the. 
gold from the veinstones differs very greatly from the alluvial 
gold: the former averaging 14}? carats fine, and the latter 
eighteen to twenty-two carats. He states that W. Birkmyre 
found that vein gold from Clunes, Victoria, was poorer than the 
alluvial gold, and that the same thing was observed by other 
assayers ; and he finally concludes that since the South American 
alluvial gold differs so much from the vein gold that it must have 
had a different origin. 
Bernhard von Cotta in his treatise On Ore Deposits, New York 
1870, in speaking of the placer deposits of the Urals, says that 
the gold is generally more or less argentiferous, the amount of 
silver varying according to G. Rose’s examinations between ‘16 
and 38:747/. It has been sometimes thought that the placer gold 
was purer (less argentiferous) than that extracted from deposits 
an situ, but G. Rose has shown that such is not the case in the 
Ural Mountains. He found that the amount of silver was very - 
variable in both cases, although the highest amount of silver was 
found in gold from veins, which contained even in the same lode 
very variable quantities.” 
Mr. Geo. Foord, F.c.s., of Melbourne, could find no difference 
between the quality of the internal and external portions of nug- 
gets ; but in one case he found a vein which was of a greenish- 
yellow in the centre, from the larger amount of silver present in 
that part of the gold.—Brough Smyth, Gold fields and Mineral 
Statistics of Victoria, p. 359 — 60. 
Mr. Birkmyre, p. 371 of the same work, points out that the 
““Welcome” Nugget weighing one hundred and eighty-four pounds 
nine ounces gave him 23 car. 3% grs. gold or 99-20%, or it was 
nearly as rich as the finest gold dust viz,, 23 carats 33 grs. 
The following analyses of gold from the North Transvaal, (E. 
Cohen, Jahr. f. Min. 1889) show a slight difference between the 
vein and the alluvial gold; but much importance cannot be 
attached to it:— | 
