Letter, 'Le cause de la diversite des coleurs [The cause of the diversity of colors]' from Paul Gaussen to unknown recipient

The transcript of this letter is not available online on Ɛpsilon.

Please cite as “RS-LP-001368,” in Ɛpsilon: accessed on 9 May 2024, https://epsilon.ac.uk/view/epsilon-testbed/royal-society/letters/RS-LP-001368