To Francis Darwin   16 April [1873]

Try only 1 or 2 drops of Formic A. I think all my larvæ are dead.1 I suspect the seeds are all dead also!! | C.D.

Ap. 16. Down.

ApcS

Postmark: AP 16 | 73

1
See letter to Francis Darwin, [before 15 April 1873] and n. 3. CD had suggested that six drops of acid should be added to water containing undeveloped spawn.

Please cite as “DCP-LETT-8862,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-8862