I can't find this, or even a trailer, online.
from The New York Times review from the time of the film's release:
If you like this sort of thing you'll find it a superior product.Fright.com says,
A most engaging evening's display of erotics.
This German silent is the most famous of the many adaptations of Hanns Heinz Ewers’ ALRAUNE, and with good reason. The film’s chilly atmosphere, perverse storyline and stunning lead performance by the incomparable Brigitte Helm make for a unique and impacting viewing experience.