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)
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Directed by: H. Bruce Humberstone
Starring: Boris Karloff, Keye Luke, Charlotte Henry, Warner Oland
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More mistakes in Charlie Chan at the Opera
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."