211 
Geological Relations of the East of Ireland ’ 
that they occur more or less scattered and disseminated through the 
rocks of the mountain, although it must be acknowledged that no 
discovery leading to this inference attended the researches of Govern- 
ment. It is, however, well known, that such occurrences are not 
uncommon in other tracts ;* and we may then conceive the gold, and 
the other metallic substances, to have been detached from their native 
seat, and to have been lodged in their present position, in company 
with other alluvial materials, at the time of the first formation of 
soil, upon the retrocession of the ocean. 
The total quantity of native gold collected by Government 
amounted to 944 ounces, 4 pennyweights, and 15 grains, of which 
58 oz. 16 dwts. 1 grain, were sold as specimens at 41. per ounce, 
amounting in value to 2361. 10s. 8d. The remaining 885 oz. 
8 dwts. 14 grains, I melted and cast into ingots, which weighed 
848 oz. 18 dwts. 5 grs. Hence the loss in melting was 36 oz. 
10 dwts. 9 grs., or nearly 4^- per cent, which arose from disseminated 
particles of quartz. The ingots produced from 21f to 21| carats of 
fine gold, the alloy being silver ; and they were bought by the Bank 
of Ireland at prices varying from 41. Os. 6d. per ounce, to 41. 2s. per 
ounce, amounting in value to 34381. 17s. 3^d. Hence the aggregate 
value of the native and ingot gold was 36751. 7s. ll^d. 
§ 106. The annexed map of Croghan Kinshela will tend to 
elucidate not only what has been said respecting its geological rela- 
tions, (§ 63.) but also the nature of the operations which were carried 
on there ; the whole being laid down from actual survey ; (see 
Plate 11.) 
* See, for example, Ulloa’s Travels in South America, vol. II. p. 160, English Transla- 
tion ; Humboldt’s Political Essay on New Spain ; Charpentier’s Beobachtungen iiber die 
Lagerstatte der Erze; Von Buch’s Geognostische Beobachtungen auf Jteiseu durch 
Deutschland und Jtalien, vol, I. p. 128 — 130. 
2 D 2 
