and generally in the Breadalbane district. Sulphides.^ 
and especially G-alena—the sulphide of lead—are in 
all auriferous countries in Nova Scotia and in 
Wales) regarded as favourable indications of the 
existence of gold, 
V, Gold iviay occun in payable quantity in 
HOCKS IN WHICH ITS PKESENCE CANNOT BE DE¬ 
TECTED EITHER BY THE MICROSCOPE OR THE 
NAKED EYE. 
This is proved by the concurrent and abundant 
testimony of all auriferous countries f e.g. quite re^ 
cently, Wales). Calvert, an experienced Australian 
mineral surveyor, found per ton of Iron-Sulphide from 
Perthshire, in which the precious metal could not be 
detected by the microscope, 13 dwts. of gold ! But 
this circumstance has more immediate application to 
auriferous quartzites—to gold in its matrix—than to 
auriferous gravels and sands. 
VII, —Gold has been found in recent times in 
DIFFERENT PARTS OF PERTHSHIRE, 
In the history of the parishes of Dunkeld and 
Dowally given in the New Statistical Account of 
Scotland ” (1845, p. 965), we read, “Gold ingrains 
has been occasionally found in a sandbank about three 
miles above Dunkeld, and fully tv/enty feet above 
the level of the Tay, A few small trinkets were 
made of it; but, the quantity of gold was so small, 
and the expense of exti acting it so great, that no 
attention is now paid to the discovery. ” Calvert, in 
his “ Gold Bocks of Great Britain f mentions its 
occurrence in Glenturret, Glencoich, Breadalbane, and 
at the mouth of the Tay—at ‘ ‘ Long Porglan Moor, 
near Dundee. ”* Undoubtedly Glenturret and Bread¬ 
albane are within the auriferous area of Perthshire— 
though Calvert erroneously places Breadalbane in 
Aberdeenshire. Glencoich is probably Glenquech, 
which runs between Amulree and Kenmore; and if 
so, it too lies in the auriferous Silurian area. Long 
Forglan Moor is probably Tentsmoor —beyond the 
hamlet of Forgan, near Newport, in Fifeshire —not 
* Gteg and Lettsom also mention “ LfOng Porglan Moot, 
near Dundee.’* 
