formed by positions of Ursa Major, [15], [16], [18];
various forms of, illustrated, [17], [19];
geographical distribution of, [19];
date when first used as symbol, [20], [21];
sign for a year or cycle of time, [23];
suggests axial rotation, [24], note;
formed by four serpents in Codex Borgia, [27];
associated with triskelion, on spearhead from Brandenburg;
on bronze brooch from Scandinavia, [28];