The temporary extension of a flask in one or more direction, to fit it for use on some special casting for which it had not been originally designed.
Twelve hundred entries from the golden age of cast metal — how bells are founded, why brass is not bronze, what a cupola melts and a core withstands — by Simpson Bolland, the trade's great teacher.
The temporary extension of a flask in one or more direction, to fit it for use on some special casting for which it had not been originally designed.