1862 London Exhibition: Catalogue: Class VIII.: William Dingwall
From GracesGuide
1838. DINGWALL, WILLIAM, 4 Idvies Street, Dundee.
Patent water meter, with distributing valves placed in a movable diaphragm.
1838. DINGWALL, WILLIAM, 4 Idvies Street, Dundee.
Patent water meter, with distributing valves placed in a movable diaphragm.