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An Argand lamp is a lamp with a circular hollow wick and glass chimney which allows a current of air both inside and outside the flame.
Swiss army knife, velcro, bank secrecyand the argand lamp were all invented in Switzerland
Émile Argand died in 1940.
Émile Argand was born in 1879.
Aimé Argand was born on 1750-07-05.