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383 DARWIN (CHARLES 1809-1882, naturalist)

A. L. s. 4 pages, 8vo, Down, Beckenham 19 October to A. G. Dew-Smith of Trinity College, Cambridge, concerning the precise instruction he wished observed during an experiment on a plant he sent to Dew-Smith (".. . There are only 2 leaves fit for action (marked with red wool). . . When a leaf closes on an object it does not generally open for 12o to 24o. If it closes over a large fly or insect it remains shut for several days, and is never active again. I doub't whether a cut-off leaf standing in water will reopen. . . ") with envelope.

*** Also included in this lot is an A.L.s. by Darwin to Mr. Marshall and a L.s. by Darwin to A. G. Dew-Smith concerning subscribers to the Zoological Station at Naples (1875).