Medicine / Anaesthetics. Ether inhaler, developed by Robert Ritter von Welz (1814-1878), manufactured by latheman Gerster, Würzburg, Germany, 1847. - Collection H. Stoeckel, Bonn. "Aether Apparat" (sketch). From: R. Welz, "Die Einathmung der Aetherdämpfe (...) ", Würzburg, 1847.