Super Siren Gives Warning Heard Two Miles Away

Contenuto

Super sirens that can be spotted in the most advantageous positions for spreading “air raid alert” alarms have been designed for installation in New York City. Capable of projecting its sound a distance of two miles, the siren is 36 inches high and operates on four horsepower.

Titolo
Super Siren Gives Warning Heard Two Miles Away
Oggetto
en
en
Article Title and/or Image Caption
Super Siren Gives Warning Heard Two Miles Away
Lingua
eng
Copertura temporale
World War II
Data di rilascio
1942-04
pagine
86
Diritti
Public Domain (Google digitized)
Sorgente
Google Books
Referenzia
New York City
Archived by
Enrico Saonara