Journal November 1841
M-042.txt page 27“Great fact made certain by Wolff & Heckel in Embryology,”
Fuller, Margaret. "Journal November 1841." Houghton Library, Harvard University; MS Am 1086; Box 5.
Inferred No work is named. Fuller refers to Caspar Friedrich Wolff — “Great fact made certain by Wolff & Heckel in Embryology,” — and the passage does not identify a specific writing.