“Giant listening horns used to listen for approaching aircraft during WWI. Image on display at the Science Museum of the National Academy of Sciences in Washington DC.”
(via)

“Giant listening horns used to listen for approaching aircraft during WWI. Image on display at the Science Museum of the National Academy of Sciences in Washington DC.”
(via)
nob: reblog day: Giant listening horns used to listen for approaching aircraft during WWI. Image on display at the...
Like Glen Baxter Does The War.
Awesome. It’s kind of like a giant tin can telephone, but you know, for bombers.
reblog day: circuitry: Giant listening horns used to listen for approaching aircraft during WWI. Image on display at the...