This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Tracts vol John Birkinshaw's patent for Malleable Iron Rails plate of . accompanies John Birkinshaw's patent for Malleable Iron Rails original tract held in the North of England Institute of Mining and Mechanical Engineers and uploaded with the authority of their librarian Jennifer Hillyard Patent Specification of John Birkinshaw