Sends abstract of Martin Ziegler’s paper on sensitive movements in Drosera ["Sur un fait physiologique observé sur des feuilles de Drosera", C. R. Hebd. Acad. Sci. 74 (1872): 1227–9].
JTM’s experiments with formic acid and ants have failed to reveal the secret of the ants, but have taught him a great deal about germination.