Spirit-level
A glass nearly filled with alcohol, just enough air being allowed to remain in it to form a bubble. The tube is then closed and fixed in a metallic or wooden case. See LEVEL.
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.
A glass nearly filled with alcohol, just enough air being allowed to remain in it to form a bubble. The tube is then closed and fixed in a metallic or wooden case. See LEVEL.