Factual error: Charlie Chan claims that mixing hydrochloric acid with ferrocyanide of potassium is mixing two acids. Ferrocyanide of potassium is not an acid. (00:27:00)
Charlie Chan at the Opera (1936)
Directed by: H. Bruce Humberstone
Starring: Boris Karloff, Keye Luke, Charlotte Henry, Warner Oland
Charlie Chan: Very old Chinese wise man once say, "Madness twin bvrother of genius because each live in world created by own ego. One sometimes mistaken for the other."
Charlie Chan: Honorable father once say, "Politeness golden key that open many doors."
Charlie Chan: Man who ride on merry-go-round often enough finally catch brass ring.
