A boo-boo in the article: Frankenstein was first filmed in 1910, then in 1915. The Karloff film was the third. The 1910 film is on dvd and up at You Tube, but the 1915 version is long lost, alas.
Instead of doing Frankenstein for the 10 thousandth time, I'd love to see a movie of the never filmed 19th century novel Varney the Vampire or the Feast of Blood (one full title)