Ɛpsilon

To B. J. Placzek   [after 19 November 1880]1

[Down.]

It appears to be impossible for a bird to use only one wing, without tumbling over and without losing its balance.2

1
The date is established by the relationship between this letter and the letter from B. J. Placzek, 19 November 1880. The letter fragment appears in a note to Placzek 1883, p. 112.

Please cite as “DCP-LETT-12829F,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-12829F