Sound mirror (dating to 1917) excavated at Fan Bay, #WhiteCliffs @southeastNT – just amazing pic.twitter.com/THGQM8n8z1
— Nathalie Cohen (@Nathalie_Cohen) October 28, 2014
Acoustic early warning systems, spectacular remnants of a dead-end technology on the British coast
Sound mirror (dating to 1917) excavated at Fan Bay, #WhiteCliffs @southeastNT – just amazing pic.twitter.com/THGQM8n8z1
— Nathalie Cohen (@Nathalie_Cohen) October 28, 2014