Notes Julius Sachs’s opinion on the heliotropism of moulds: he can see no use in the response.

C. E. Stahl is working on swarm spores which can be made both helio- and apheliotropic.

Sachs has told him that some ferns sleep, and he suspects that some grasses may move.

Sachs also feels they may be working at bloom from a wrong point of view and suggests leaves may need to keep dry in order to keep their stomata open.

Is forwarding the writing machine to Carl Semper.

Is glad FD has taken up his old friends, the twiners.

Hopes to get heliotropic aerial roots from J. D. Hooker. Asks FD to find out whether any moulds or roots are apheliotropic. Is puzzled by heliotropism in subterranean roots.

Experiments on effects of removing "bloom" from leaves and fruit.

Comments on function of bloom.

Describes the effect of water shortage on sleep movements in Porlieria.

Sachs jumps to the conclusion twiners and tendrils are similar from the Menispermum that twined without a stick. Akebia grows down a stick; not only the free end is involved.

Sleeping plants.

Is pleased FD’s climbing work goes well.

Thanks him for information on heliotropism.

Discusses sleep movements

and his observations on the sensitivity of radicle tips.

Instructs FD to plant some Oxalis seeds.

Wishes to trace the movement of an old cotyledon. Asks him to examine and compare the pulvinus of a species which moves its cotyledon greatly with one of a species that moves it only moderately.

Are the tendrils ready for heliotropic experiment yet?

Instructions to sow some seeds

and suggestions for experiment on effects of removal of bloom.

Likes Hugo de Vries very much; has hardly ever seen so modest a man.

Asks FD to reply to a letter [11653a] requesting a list of CD’s books.

Writes for CD. Thanks correspondent for curious case of inheritance, which CD cannot use as he is working in different directions.

Julius von Sachs’s views on stomata seem largely correct, but CD cannot understand how leaves can survive submerged for such long periods.

Has been observing Drosera and concludes that none of the movement of the tentacles is caused by growth.

Suggests observations to show role of pulvinus in leaf movement.

He has been working hard at Kew for two days.

Asks what position the sub-peduncles assume when the main flower peduncle of Oxalis is tied so as to be horizontal.

Asks whether FD can find some plants at Kew for CD to trace epinastic and hyponastic movements.

FD reports that CD thinks CH’s observations on limpets worth publishing (Hawkshaw 1878).

Marlborough Robert Pryor of Weston Park, Stevenage, is an admirable naturalist, especially concerning limpets.

Instructs FD to make some observations on movement in Trifolium and Impatiens. Sends some seeds to be sown.

Horse chestnut roots have not acted at all well.

He is getting some of the Heracleum seed sowed and the Cycas planted. Does CD want anything done with the potatoes sent by James Torbitt?

Suggests experiment to detect salts deposited on surface of leaves.

Wants FD to have another go at horse-chestnut radicles.

Many thnks for the pelargonium letter.

He has had no success with horse or Spanish chestnuts.