SPINA: a plug, as at the outlet hole of a furnace, & thus used for the outlet hole itself. Tra. 172; V. li., 421. See also [BOCCA] DELLA SPINA.
SPINELLA: spinell. Tra. 39.
SPINGERE: see [SPICCARE].
SPOGLIA: the shell or outer mould of a cire perdue casting between which and the core, nócciolo, is the cavity which subsequently receives the bronze. Tra. 173. See also [TONACA].
SPOLVEREZZO, SPOLVERIZZATO: see [AFFUMARE].
SPORTELLI, SPORTELLETTI: the doors of a furnace; the little doors that open into any closed fire place. Tra. 191, 193.
SPRUZZARE: to sprinkle. Tra. 74.
SPUGNUZZE: bubble holes. Tra. 18.
STACCIARE: to sift. STACCIO: a sieve. Tra. 138.
STAFFA: a frame, e.g., the frame for sand casting, or for holding dies for stamping. Tra. 132.