THE MINERALOGY OF SCOTLAND. 453 
In Dr. Maccutiocy’s Western Islands, of date 1819, no mention is made 
of wolfram in Rona; his geological remarks on which conclude with “I have 
only to add, that tetrahedral grouped crystals of oxidulous iron are not un- 
frequent in the granite veins.” GREG and Lerttsom give a figure of hemitrope 
octahedrons from the spot. 
It was hardly excusable for a man like Dr. MaccuLtocu, whose compass 
was constantly picking out the errors of MAckENzIr’s chart, to mistake 
magnetite for wolfram. ; 
In the Traveller's Guide through Scotland,—written in 1806, by JouNn 
Watson, father of the late Dr. Watson Wemyss of Denbrae, Fifeshire, and 
which Guide contains a fuller and more accurate account of Scottish minerals 
than any work I am acquainted with,—we read—“ It is said that Mr. Raspe 
found a specimen of wolfram in Tiree.’ Raspe seems to have had a faculty of 
finding everything—everywhere. No one has found wolfram since his time in 
Tiree, so that Ais wolfram was probably also magnetite. 
A common error seems to be to set down such magnetite as occurs in 
granite veins with a faint biuish tarnish, as being “titanic iron.” We find 
even JAMESON doing this, in speaking of that which occurs in the granite veins 
of Harris. This my analysis below shows to be a magnetite which contains 
no trace of titanium. 
The largest mass of magnetite I have seen in Scotland was a loose-lying 
lump which lay upon Drum-na-Raabm, in the Coolins. It consisted of inter- 
locked crystals about the size of peas, and might have weighed forty or more 
pounds. 
The largest solid lumps were got in blasting graphic-granite at Rispond, in 
Sutherland. These were cleavable masses, nearly the size of a fist. 
I make no attempt to record the localities in which I have found magnetite 
in Scotland; it is of interest, however, to note its occurrence in definite 
crystals. 
1. Among the cliffs, a little to the west of the houses at Aith, on the south 
shore of Feltar, in Shetland, it occurs in yellow precious serpentine, in minute 
cubes. 
2. It occurs imbedded in massive aphrosiderite at 
Pundygeo, near Fethaland, Sutherland, in hemitrope 
octahedra, over half an inch in size (fig. 3). 
3. In dodecahedra, with faces striated towards 
octahedral facettes ; in serpentine, at Vanleep, opposite 
the Drongs, at Hillswick, Shetland. 
