Specification of David Walker : preventing smoke in furnaces.
- Walker, David.
Public Domain Mark
About this work
London : Great Seal Patent Office, 1870 (London : George E. Eyre and William Spottiswoode)
5 pages, 1 folded leaf of plates : illustrations ; 28 cm
At head of title: A.D. 1870, 6th May. No. 1299.
"David Walker, of Leith, in the county of Mid Lothian, North Britain, engineer".