in the glass manufacture, a small round aperture in the furnace, beside the bocca, and almost horizontal with it. Out of this and another similar aperture the servants take coloured or finer metal from the piling pot.
in the glass manufacture, a small round aperture in the furnace, beside the bocca, and almost horizontal with it. Out of this and another similar aperture the servants take coloured or finer metal from the piling pot.