Sound energy: refraction of sound by means of a lens formed by a thin rubber membrane and filled with carbonic acid. Anonymous illustration from 1925. Private collection.Anonymous Anonymous |
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Undated · Engraving
· Picture ID: 929426
colour · colours · engraving · physical · caoutchouc · knowledge · experience · meaning · yeah · bianchetticor · energy · energy · Private Collection / Bridgeman Images |
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