STORMGLASS n.
A glass vessel, usually cylindrical, filled with a solution which is sensitive to atmospheric changes, indicating by a clouded appearance, rain, snow, etc., and by clearness, fair weather.
AGISTER; AGISTOR n. 2 definitions
Formerly, an officer of the king's forest, who had the care of cattle agisted, and collected the money for the same; -- hence called gisttaker, which in England is corrupted into guest-taker.