Ancestry have updated the collection of records from the UK Institution of Mechanical Engineers. There are now 73,781 records, and perhaps one third that number of distinct individuals.
The database contains registers of members, proposals for memberships and changes to membership (such as associate member to member), and related records, including the following:
membership records of IMechE (1847–1930)Even if you know a lot about the person, information on application forms, such as education and the names of sponsors with whom they were associated, may well be new.
register of members (1847–1930)
typescript membership proposal forms
membership records of IAE (1906–1930)
membership records of ILE (1915–1930)