Summary

JDH and Oliver impressed with CD’s observations on gyratory motion of plants.

CD pleased with Bentham’s Linnean Society address on the reception of Darwinism [J. Proc. Linn. Soc. Lond. 7 (1863): xi–xxix].

JDH’s social "dogma": "Brains x Beauty = Breeding + wealth".

[Dated 9 June by JDH.]

Summary

Suggests collecting seeds at different heights from British Columbia.

Describes experiment on seeds from short anthers.

C. V. Naudin writes he has discovered cause of hybrid sterility.

Summary

Discusses the meaning of C. K. Sprengel’s term "dichogamy". Dichogamous plants are functionally monoecious; Primula is functionally dioecious.

Reports Hermann Crüger’s observations of Cattleya and of bees pollinating Catasetum. Crüger will observe Melastomataceae.

Has built a hothouse.

Fears Amsinckia cannot be dimorphic.

Ill health slows his work on Variation.

Summary

Discusses methods of pollination in orchids.

Thinks RT should investigate Physianthus to see if it requires insect aid for fertilisation as the Asclepiadaceae do.

Summary

Encourages JS to continue work on coloured primrose. No one has noticed this since Gärtner. CD will send his own data for JS’s use and will read MS when ready. Advises JS to repeat experiments if evidence is weak – for his reputation’s sake and for satisfaction at fully establishing a fact.

Treviranus made a slip of pen in writing of Primula longiflora as short-styled.

Summary

Encloses his notions [missing] on John Scott’s offer; some points in explanation.

Summary

His better opinion [of work of Boucher de Perthes].

Explains his position on CL’s treatment of species.

Mentions positive response to his ideas on the part of a German professor [Ernst Haeckel], Alphonse de Candolle, and a botanical palaeontologist [Gaston de Saporta].

Notes negative reaction of entomologists.

Mentions Falconer’s objections [to Antiquity].

Mentions work of Hooker.

Comments on paper by Owen ["On the aye-aye", Rep. BAAS 32 (1862) pt 2: 114–16]

and CD’s review of Bates’s paper [Collected papers 2: 87–92].

Thinks Natural History Review is excellent.

Summary

Dimorphism in Linum.

Situation in some of the lower Algae is analogous to that in phaenogams. In some, conjugation occurs between separate filaments, in others between cells of same filament.

Forwards a letter from S. O. Glenie enclosing specimens of Cassia fistula which show the two forms of the anthers.

Summary

Pleased CD has had his [FH’s] orchid paper published [Ann. & Mag. Nat. Hist. 3d ser. 12 (1863): 169–74].

Extension of CD’s Primula heterostyly work.

Summary

JDH lays hard treatment of John Scott to J. H. Balfour’s anti-Darwinism.