Nils Dalen1912
Invents the light controlled valve allowing lighthouses to operate automatically
Sweden · Science / Technology. Chronological records rendered directly from the World History Database.
Invents the light controlled valve allowing lighthouses to operate automatically
This factsheet is generated from stored World History Database records matching the country, broad category, detailed category and exact Event value shown above. Duplicate display records are collapsed; database wording is otherwise preserved. Source provenance varies by record, so formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.