Frankenstein is a 1910 film made by Edison Studios that was written and directed by J. Searle Dawley. It was the first motion picture adaptation of Mary Shelley's Frankenstein. The unbilled cast included Augustus Phillips as Dr. Frankenstein, Charles Ogle as the Monster, and Mary Fuller as the doctor's fiancée.
Shot in three days, it was filmed at the Edison Studios in the Bronx, New York City. Although some sources credit Thomas Edison as the producer, he in fact played no direct part in the activities of the motion picture company that bore his name.
Frankenstein is in the public domain, and you can download it here for free: