On various subjects: Dana’s misquotations,
H. J. Clark’s book Mind in nature [1865],
BDW’s Cynips experiments, galls,
Balbiani’s paper on aphids ["Sur la reproduction et l’embryogénie des pucerons", C. R. Hebd. Acad. Sci. 62 (1866): 1231–4, 1285–9, 1390–4].
Claus and other Germans testing CD’s views of variability in common lower animals.