Summary

CD has asked CM whether he can supply William Kemp’s address, and CM passes the enquiry to TW.

Summary

[Written on CD’s annotated copy of a pamphlet reprint of CM’s review of Coral reefs.] CD asks CM to return the pamphlet to him.

Summary

Responds to CM’s review of Coral reefs [Edinburgh New Philos. J. 34 (1843): 33–47].

Summary

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.

Summary

Discusses his Glen Roy paper [(1839), Collected papers 1: 87–137], which he is sending to CL.

Remarks on Charles MacLaren’s treatment of alluvium. Comments on alluvial action in Lochaber.

Summary

Discusses relationship of subsidence to the formation of coral reefs.

Summary

Acknowledges TW’s letter supplying him with William Kemp’s address.

Summary

CD has read WK’s abstract in the Scotsman, 15 February 1840, p. 3, and asks for further details.

Summary

Discusses enclosed figures on elevation of terraces in several Scottish glens as surveyed by William Kemp and David Stevenson. Comments on Robert Chambers’ view of the terraces. Mentions a letter on the terraces, originally written for publication, which he has asked Robert Jameson [editor of the Edinburgh New Philos. J.] to destroy.

Summary

Seeks CD’s opinion and references on the causes of terraces in the south of England. He supports sea action as cause, either by currents or on coasts, and has been engaged in a controversy in the Geological Magazine [4 (1867): 571–5] with the subaerial school. Poulett Scrope thinks they are agricultural.

Summary

Comments on article by David Milne ["On the parallel roads of Lochaber" (1847), Trans. R. Soc. Edinburgh 16 (1849): 395–418]. Refers to his paper on Glen Roy [Collected papers 1: 87–137]. Comments on Louis Agassiz’s article ["The glacial theory and its recent progress", Edinburgh New Philos. J. 33 (1842): 217–83]. Cites his own observations on glaciers in N. Wales. Discusses possibility of ice barrier creating lake. Notes objections to theory of an ice barrier. Defends his own theory that the roads are sea-beaches. Suggests questions for further investigation.

Summary

Criticises at length the concept of submerged continents attaching islands to the mainland in the recent period. Notes drastic alteration of geography required, the dissimilar species on opposite shores of continents, and differences between volcanic islands and mountains of mainland areas. Admits sea-bed subsidence, but not enough to engulf continents. Denies that theory can explain island flora and fauna.

Considers Edward Forbes’s idea a check on study of dissemination of species.

Summary

The new pigeon house is nearly complete.

CD is busy trying all sorts of experiments on salting seeds.