Specification of Nathaniel Johnston
Subtitle: breeding, rearing and carrying leeches
Publisher: Great Seal Patent Office
Published: 1855
Place of publication: London
Language: eng
Subjects: Leeches; Animal culture; Animal breeding
Notes: Cover title.

At head of title: A.D. 1854. No. 2594.

"Nathaniel Johnston, of Bordeaux, at present in Paris".

Patent for "Spring trusses for ruptures on a new construction, both simple, double, navel, side and inguinal".