Air-Operated Siren Gives Air Raid Warnings
Item
Compressed air is used in a siren developed at the Bell Telephone laboratories to give it a powerful wail. Placed on the Manhattan bridge in New York City to test its ability as an air raid siren, it sent out a shriek that was heard as far away as the Battery.
Title (Dublin Core)
Air-Operated Siren Gives Air Raid Warnings
Subject (Dublin Core)
en
Technology
Article Title and/or Image Caption (Dublin Core)
Air-Operated Siren Gives Air Raid Warnings
Language (Dublin Core)
Eng
Temporal Coverage (Dublin Core)
Date Issued (Dublin Core)
1942-06
Is Part Of (Dublin Core)
pages (Bibliographic Ontology)
32
Rights (Dublin Core)
Public domain
Source (Dublin Core)
References (Dublin Core)
Archived by (Dublin Core)
Enrico Saonara