Specification of David Gill : deodorizing sewer gas.
- Gill, David.
About this work
London : Great Seal Patent Office, 1875 (London : George E. Eyre and William Spottiswoode)
3 pages, 1 folded leaf of plates : illustrations ; 28 cm
At head of title: A.D. 1875, 23rd July. No. 2621.
"David Gill, of the town of Weston-super-Mare, in the county of Somerset".