Curie, Pierre. and Curie J. "Development, par pression de l'electricite polaire dans les cristaux hemiedres a faces inclines." Paris, as published in the Comptes Rendus, 1880, volume 91, pp 291–5. This offered int he original wrappers, removed from a larger bound work. Very good copy. $200
"The evolution of ultrasonography dates back to 1880, when Pierre and Jacques Curie discovered piezoelectricity...."--Texas Heart Institute Journal, "Cardiology's 10 Greatest Discoveries of the 20th Century" by Nirav J. Mehta and Ijaz A. Khan.
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