Specification of Wilkinson Jackson, Joseph Jackson, & James Cowgill
Subtitle: preventing escape of smoke from furnaces
Contributors: Jackson, Joseph; Cowgill, James
Publisher: Great Seal Patent Office; George E. Eyre and William Spottiswoode)
Published: 1870
Place of publication: London
Language: eng
Subjects: Smoke prevention; Furnaces; Steam-boilers
Notes: Cover title.

At head of title: A.D. 1869, 1st November. No. 3170.

"Wilkinson Jackson and Joseph Jackson, of Halifax, in the county of York, and James Cowgill, of Bradford, in the same count, engineers".