Specification of Henry Francis
Subtitle: machinery for the manufacture of truss springs
Publisher: Great Seal Patent Office
Published: 1859
Place of publication: London
Language: eng
Subjects: Trusses
Notes: Cover title.

At head of title: A.D. 1858, 16th October. No.2311.

"Henry Francis, of no. 456, West Strand, Westminster, in the county of Middlesex, engineer".