Specification of John Lacey Davies : purifying smoke.
- Davies, John Lacey.
About this work
London : Great Seal Patent Office, 1867 (London : George E. Eyre and William Spottiswoode)
4 pages, 1 folded leaf of plates : illustrations ; 28 cm
At head of title: A.D. 1867, 9th April. No. 1058.
"John Lacey Davies, of the firm of John Davies and Son, of 4, St. Ann's Square, Manchester... patent agents".