Dropsies are produced from images generously made available by The Internet.

Y ci INNER CAVITY SYSTEM INNER CAVITY VENT OUTLET CANISTER CANISTERS (PLENUM) CHECK VALVE OUTER CAVITY \ CREW ae : MODULE PAYLOAD OBSERVATION ane LINE— 721 WINDOW CAVITIES LINE > > .

Two layers. Layers are put into a buttered mould on a buttered fish-mould, cover with buttered cracker.