Detail
Type Ml. - Merzermühle is a Mühle (Mill).
Kr Altkirch - The Kreis for Merzermühle is Altkirch. A Kreis is a government district (similar to a U.S. county).
See Merzen 1) - A See notation means the entry is dependent on another entry. In this case, Merzermühle is dependent on Merzen 1), which should be consulted for additional information.