AUTHENTIC DESIGNS INC Argand Sconce Two Arm in Special Pewter with Ivory Candle Sleeves Two Glass Globles. Condition: Preowned in excellent condition. 1 back plate and mounting bolt. This lantern is based on an original design by the Swiss physicist and chemist Aimé Argand. Patented in 1780, it was the first fixture to employ a hollow cylindrical wick through and around which air flows, increasing the intensity of the light produced. The invention counted among its fans Thomas Jefferson, who noted that the brightness was 6 to 10 times that of conventional wicks. Hand made in Vermont. Metal parts are hand-plated with a pewter formula. They will oxidize darken and acquire the patina of mottled, old pewter. DO NOT USE METAL POLISH AS IT WILL REMOVE THE PLATING.