192 Queries and Answers. 



disposed in large masses. Will some one of your geological 

 or mineralogical correspondents, who has visited the Scottish 

 isles have the kindness to inform me which is right? — 

 TV. Perceval Hunter. 



The remark of Phillips is truly Irish. Pitchstone is found 

 in Scotland, in the isles of Arran, Skye, Lamlash, Canna, and 

 Mull. Pitchstone is generally found in dikes ; and when in 

 veins, as in Arran, where it interlaces sandstone, the veins are 

 decidedly intrusive. In Lamlash, off Arran, there is a dike, 

 the centre of which is basalt, the sides pitchstone; and 

 Dr. Macculloch states that, where basalt ramifies into slender 

 filaments, it becomes pitchstone. Vide Daubeny on Volcanoes, 

 p. 422. See also Macculloch on the Western Islands ; Poulett 

 Scrope on thePonza Isles, Geological Transactions, 2d series, 

 vol. ii. p. 195 — 236.; Messrs. Lyell and Murchison, on the 

 excavation of valleys, as illustrated by the volcanic rocks of 

 central France, in the Edinburgh New Philosophical Journal, 

 for, 1829 (p. 15. of that memoir); Scrope's Memoir on the 

 Geology of Central France ; A. Brongniart, Tableau des 

 Terrains, &c, p. 357. ; Bake well's Geology, p. 376, &c. 

 These references will throw some light on the nature and 

 formation of pitchstone. Phillips {Introduction to Mineralogy, 

 3d edit. p. 131.) gives as localities, Cairngorm and Arran, 

 in granite ; Skye, Canna, and Mull, in trap ; and Leonhard 

 (Handbuch der Oryktonosie, p. 182.) adds Eskdalemuir in 

 Dumfriesshire, and Ardnamurchan in Argyleshire. The 

 author of this note possesses several specimens of pitchstone 

 (in addition to many from Auvergne, the Cantal, St. Helena, 

 the Isle of Ascension, Iceland, Hungary, and Italy) from 

 Arran, where the dikes and veins are considerable, and the 

 removed " blocks" comparatively large; as well as from Newry, 

 in Downshire; which proves that Phillips is correct, as well 

 as "the man" from whom Mr. Hunter purchased his specimen. 

 For the illustration of the Irish localities, see Fitton's Mine- 

 ralogy of Dublin, p. 53. On the subject of dikes, see Lyell's 

 Geology, i. 342., ii. 303.; De la Beche's Manual, p. J 28.; 

 Buckland and Conybeare, G. T. vol. iii. — W. B. C. Feb. 2. 

 1833. 



The Second Volume of Fleming's British Animals. — Is this 

 to be published, and when? — Robert Banking. Hastings, 

 Dec. 12. 1832. 



Has a List of the Plants of Lincolnshire ever been 

 published ? If one has, how lately, in what work, and by 

 what bookseller ? — B. 



