Artificial roof horizon mercury jar

A circular metal jar with threaded stop for storing the mercury when not in use (full).

ID:	NAV0007.4
Type:	Artificial roof horizon mercury jar
Display location:	Not on display
Credit:	National Maritime Museum, Greenwich, London, Adams Collection
Parts:	Roof artificial horizon (Artificial Mercurial Horizon) Artificial roof horizon box (NAV0007.1) Artificial roof horizon tray (NAV0007.2) Artificial roof horizon hood (NAV0007.3) Artificial roof horizon mercury jar (NAV0007.4) Artificial roof horizon mercury jar lid (NAV0007.5) Artificial roof horizon box key (NAV0007.6)