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Switzerland. Canton Vaud. Payerne. Old farm. Derelict barn entrance. Wooden door. Barred window. A drawing of a duck and two ducklings. Old Swiss flag. A bellows or pair of bellows is a device constructed to furnish a strong blast of air. The simplest type consists of a flexible bag comprising a pair of rigid boards with handles joined by flexible leather sides enclosing an approximately airtight cavity which can be expanded and contracted by operating the handles, and fitted with a valve allowing air to fill the cavity when expanded, and with a tube through which the air is forced out in a stream when the cavity is compressed. 28.03. 2024 © 2024 Didier Ruef