Returns Lake Superior [1850], which he already has received from Agassiz. Thanks for pamphlets by C. B. Adams [on Mollusca, Contrib. Conchol. 10 (1851): 189–206; 11 (1852): 207–15].

Describes his dissection of an unusual cirripede [Alcippe lampas] with 12 males attached [see Living Cirripedia 2: 556, 558].

Volcanic activity of Mt Kilauea as described by Dana [Am. J. Sci. 2d ser. 9 (1850): 347–64]. Discusses the mechanics of volcanic eruption. Disputes view of William Hopkins that simultaneous action by volcanoes of different heights must come from separate lava sources. Notes relationship of continental elevation to volcanic action.

Describes meeting of Geological Society [1 June 1853].

Mentions his criticism of Murchison’s lecture on flints.

Describes Robert Chambers’ "On the glacial phenomena in Scotland" [Edinburgh New Philos. J. 54 (1853): 229–82].

Mentions controversial election of members to the Royal Society.