J. R.[26]
FOOTNOTES:
[24] From London's Magazine of Natural History (London, Longmans & Co., 1834), vol. vii., No. 41, pp. 438-9, being its author's earliest contribution to literature.—Ed.
[25] This lake, however, if the poet have spoken truly, is not very feculent:—
"Lake Leman woos me with its crystal face,
The mirror where the stars and mountains view
The stillness of their aspect in each trace
Its clear depth yields of their far height and hue."
Byron.
[26] In the number of the magazine in which this note appeared was an article by "E. L." on the perforation of a leaden pipe by rats, upon which, in a subsequent number (Vol. vii., p. 592), J. R. notes as follows: "E. S. has been, surely, too inattentive to proportions: there is an inconsistency in the dimensions of a leaden pipe about 1¼ in. in external diameter, with a bore of about ¾ in. in diameter; thus leaving a solid circumference of metal varying from ½ in. to ¾ in. in thickness.—J. R., Sept. 1834."—Ed.
FACTS AND CONSIDERATIONS ON THE STRATA OF MONT BLANC, AND ON SOME INSTANCES OF TWISTED STRATA OBSERVABLE IN SWITZERLAND.[27]
270. The granite ranges of Mont Blanc are as interesting to the geologist as they are to the painter. The granite is dark red, often inclosing veins of quartz, crystallized and compact, and likewise well-formed crystals of schorl. The average elevation of its range of peaks, which extends from Mont Blanc to the Tète Noire, is about 12,000 English feet above the level of the sea. [The highest culminating point is 15,744 feet.] The Aiguille de Servoz, and that of Dru, are excellent examples of the pyramidal and spiratory formation which these granite ranges in general assume. They rise out of immense fields of snow, but, being themselves too steep for snow to rest upon, form red, bare, and inaccessible peaks, which even the chamois scarcely dares to climb. Their bases appear sometimes abutted (if I may so speak) by mica slate, which forms the southeast side of the Valley of Chamonix, whose flanks, if intersected, might appear as (in fig. 72), a, granite, forming on the one side (B) the Mont Blanc, on the other (C) the Mont Breven; b, mica slate resting on the base of Mont Blanc, and which contains amianthus and quartz, in which capillary crystals of titanium occur; c, calcareous rock; d, alluvium, forming the Valley of Chamonix. I should have mentioned that the granite appears to contain a small quantity of gold, as that metal is found among the granite débris and siliceous sand of the river Arve [Bakewell, i. 375]; and I have two or three specimens in which chlorite (both compact and in minute crystals) occupies the place of mica.