Trivia: Boris Karloff hated the idea of having the monster talk because he had built the integrity and 'charm' of the monster around silence.
Trivia: In the opening credits, Elsa Lanchester is not credited as "The Bride." The character is listed as "?"
Trivia: The Bride has only 5 minutes of screen time.
Answer: From "Behind the Camera - Bride of Frankenstein": "Special effects experts John Fulton and David S. Horsley spent two days shooting Dr. Pretorius' miniature beings. The actors were placed in full-sized bell jars set against black velvet. These shots were meticulously lined up to match them with shots of Ernest Thesiger, Colin Clive and the interior set."