Summary

Thanks for sending Nature; plans to leave on 22 May; anecdote about Bernard.

Summary

Thinks it would be a good idea to give the typing machine to Karl Semper.

Summary

Sleep of Porlieria hygrometrica seems independent of light.

Will have lots of time for oats. W. F. P. Pfeffer’s point is that there is no growth in sleepers with joints. A. F. Batalin says there is a slight growth.

[Dated Saturday 28th by FD.]

Summary

Reports observations on day and night movement in Porlieria.

Summary

He has been talking to Julius von Sachs about sleeping plants that move with and without growth.

Summary

Sleep in Porlieria studied.

Oats begin germinating.

Summary

Chlorophyll development in oat seedling.

Lists the sleeping plants he has seen.

Julius Sachs thinks Hugo de Vries has not cleared up everything [about climbing plants]. But Sachs has not worked on the mechanical problem.

Summary

More sleepers from green-house.

Julius Sachs’s view of climbing plants: he distinguishes between nutation to find a support and growth after support is found.

Summary

Has been investigating nutational movements of climbing plants; comments on the opinions of Julius von Wiesner and Julius Sachs. Remarks on the sleep movements of certain plants and the mechanism of tendril curvature. Is experimenting with Porlieria.

Has visited K. G. Semper’s laboratory.

Summary

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.

Summary

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

Summary

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.

Summary

Observations of leaf movement at Würzburg Botanic Garden.

Summary

He has been working hard at Kew for two days.

Summary

Horse chestnut roots have not acted at all well.

Summary

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?

Summary

Many thnks for the pelargonium letter.

Summary

He has had no success with horse or Spanish chestnuts.

Summary

Describes his talk with Julius von Sachs about canary-grass.