Detail
Type Fbr. - Pulvermühle is a Fabrik (Factory).
Kr Grafschaft Wernigerode - The Kreis for Pulvermühle is Grafschaft Wernigerode. A Kreis is a government district (similar to a U.S. county).
See Ilsenburg 1) - A See notation means the entry is dependent on another entry. In this case, Pulvermühle is dependent on Ilsenburg 1), which should be consulted for additional information.