Chemical Furnaces & Vessels — Wecher, 17th-Century French MS

A The space filled with water. ÷

B The space that contains the vapors, and where the courges gourd-shaped flasks are suspended. ÷

C The lid having four pertuis openings for four uescies bladders These bladders were used to create an airtight seal around the necks of the glass flasks.. ÷

D The canal vent or shaft with the grate at the bottom, where the fire is lit. ÷

DD The copper vessel, which is twice as high as the bain-marie water bath. — ÷

A technical illustration depicts a cylindrical alchemical furnace colored in shades of orange and brown to represent copper. The vessel stands on three sturdy wooden legs. It is divided horizontally into two sections, labeled A and B. On the flat lid, labeled C, there are four small circular vents, each marked with a cross, surrounding a central protruding tube. The label D appears near the vents and at the bottom of the cylinder. Two small ring handles are attached to the upper section of the vessel.