Specification of Edmund Youldon
Subtitle: apparatus for ventilating chimneys
Contributors: Howard, James Henry
Publisher: Queen's Printing Office
Published: 1854
Place of publication: London
Language: eng
Subjects: Chimneys; Ventilation; Smoke prevention
Description: Patent for "improvements in preventing or curing what are termed smokey chimneys".
Notes: Cover title.

At head of title: A.D. 1834. No. 6654.

"Edmund Youldon, of Exmouth, schoolmaster".