Specification of William Pritchard
Subtitle: apparatus for regulating supply of air to furnaces
Publisher: Queen's Printing Office; George E. Eyre and William Spottiswoode)
Published: 1854
Place of publication: London
Language: eng
Subjects: Fireplaces; Furnaces; Steam-boilers; Steam-engines; Smoke prevention
Notes: Cover title.

At head of title: A.D. 1820. No. 4523.

"William Pritchard, of Leeds, in the county of York, engineer."