Summary

Heath is generally cut every six years, often in order to provide young growth for grazing. Also, the heath is in good condition for burning at six years growth.

Summary

Will be grateful for facts from Mr Linton on numbers of eggs from goldfinch–canary crosses.

Summary

Translates some German terms describing colour of horses.

Summary

Thanks AG for 2d part of "Statistics [of the flora of the northern U. S.", Am. J. Sci. 2d ser. 22 (1856): 204–32; 2d ser. 23 (1857): 62–84, 369–403].

Is glad AG concludes species of large genera are wide-ranging, but is "riled" that he thinks the line of connection of alpine plants is through Greenland. Mentions comparisons of ranges worth investigating.

Believes trees show a tendency toward separation of the sexes and wonders if U. S. species bear this out. Asks which genera are protean in U. S.

Summary

Sexes of algae.

Summary

Congratulations [on Mrs H’s delivery].

Balanus balanoides positively identified by CD.

Summary

Thanks for information, which is just the amount he wanted.

Will not go to the BAAS meeting in Dublin: the frightful voyage deters him.

Summary

Thanks for a kind note, and asks not to answer until better.

Summary

Will attend to any subject in Jamaica about which CD wants information.

Crithagra brasiliensis and canary refused to pair.

A collection of Jamaican land Mollusca will be presented to the British Museum.

Hurricanes are a considerable influence on diffusion of birds and insects.

Summary

Enumerates fossil mammals known in Secondary strata.

Lack of angiosperm plants in rocks older than Chalk is no reason to anticipate rarity of warm-blooded quadrupeds.

Summary

CD will advise W. F. Daniell on collecting.

Summary

Asks THH question on flow of glaciers after ice has been fractured and fragmented.

CD had to leave Royal Society lecture [joint paper by THH and J. Tyndall, "On the structure and motions of glaciers", Philos. Trans. R. Soc. Lond. 147 (1857): 327–46] before the end because of headache.

Summary

CD will advise Daniell not to apply for Royal Society grant.

CD’s experiment: fish fed seeds, which germinated when voided.

Summary

CD finds Alphonse de Candolle very useful, though JDH has low opinion.

CD argues for accidental introductions explaining some odd distributions, e.g., New Zealand vs Australian plants.

CD’s method.

Diverging affinities in isolated genera.

Summary

Feels unqualified to offer advice on research by the expedition; he has never attended to natural history of the region. Suggests collecting Carboniferous plants and studying the geographical extension of sea-borne erratic boulders.

Summary

Dining with the Lubbocks.

JL’s paper on respiration of insects ["On the distribution of the tracheae in insects", Trans. Linn. Soc. Lond. 23 (1860–2): 23–50].

Summary

Sends specimens of Tortrix, which illustrate the extraordinary variation of markings in two or three species. In every family of Lepidoptera there seem to be species extremely prone to vary and in some localities they vary more than in others.

Summary

Thanks THH for his response on glacial movement. Hopes Tyndall will experiment on broken ice and explain how two pieces of ice can freeze together.

Sorry to hear of THH’s row with Richard Owen.

Summary

CD is "as ignorant of mechanics as a pig", but glaciers have interested him greatly. Hopes to hear that JT’s experiments with ice will explain the freezing together of ice below the freezing point.

Summary

Have all varieties been bred from the same set of eggs so that there can be no doubt they are all the same species?