Asks CL to address a letter to Charles Maclaren.
Discusses recent publication by David Milne on erratic boulders [Edinburgh New Philos. J. 42 (1847): 154–172].
Views of Bernhard Studer on foliation of gneiss in the Alps. Asks CL to tell Leonard Horner of Studer's views.
My dear Lyell
Would you be so good, (if you know it) as to put Maclaren's address on the
enclosed letter & post it. It is chiefly to enquire in
what paper he has described the Boulders on Arthur's Seat.— M
I have been delighted by finding in the New. Eding. a short letter from Studer to
Forbes, saying that he has proved the layers in gneiss have
nothing to do with stratification in the Alps.— I think this one of the newest
things in my Book—but Studer does not guess that this foliation of the gneiss,
mica-slate &c, is only much developed cleavage. Would
you tell M
You cannot think how much I enjoyed your visit here; I don't believe you could have lost much time, so I heartily hope we shall see you here early next summer
With kindest remembrances to M
- f1 1051.f1The conjectured date is based on CD's reference to Studer 1847b and is the Saturday following his letter to Bernhard Studer, 20 January .
- f2 1051.f2Charles Maclaren. CD's letter to him has not been found.
- f3 1051.f3Maclaren 1839, p. 47. Arthur's Seat is a volcanic formation near Edinburgh.
- f4 1051.f4Milne 1847a, p. 167. The crux of David Milne's argument against the iceberg hypothesis was the presence of boulders deposited at levels higher than the levels of their parent rocks. He held that floating icebergs could not accomplish such transportation, and he also argued that the boulders would not have been embedded in the clay substratum if they had been dropped by melting icebergs. CD was a leading proponent of the theory that boulders were transported by floating ice (see ‘On the distribution of the erratic boulders … of South America’, Collected papers 1: 145–63).
- f5 1051.f5CD's rejoinder was not sent to the Edinburgh New Philosophical Journal but developed into the paper ‘On the transportal of erratic boulders from a lower to a higher level’ (Collected papers 1: 218–27), read before the Geological Society on 19 April 1848.
- f6 1051.f6C. Lyell 1845, 2: 98–9, 173–5, giving evidence of iceberg action. CD cited Lyell on the subject in ‘On the transportal of erratic boulders’ (Collected papers 1: 222–3).
- f7 1051.f7CD was at work on the anatomy of the Cirripedia (Correspondence vol. 4, Appendix I).
- f8 1051.f8Studer 1847b. See letter to Daniel Sharpe, [19 January 1847], n. 2.
- f9 1051.f9South America, pp. 140–68. See particularly pp. 140–5, on gneiss, and pp. 162–8, in which CD concluded that both foliation and cleavage were products of the same process and independent of stratification. See also letter to Charles Lyell, [on or before 20 January 1847], n. 2.
- f10 1051.f10Leonard Horner did not refer to CD's contributions on foliation and cleavage, choosing instead to emphasise his work on elevation and subsidence (Horner 1847).
- f11 1051.f11Charles Lyell had visited CD at Down House on 16 January 1847. See Correspondence vol. 3, letter to J. D. Hooker, [December 1846 – January 1847], for CD's intention to invite Lyell.