the nadir of [thise 3 houses] the by-ginning of the 3 houses that
folwen. And for the more declaracioun, lo here thy figure.
[38.] To finde the lyne merydional to dwelle fix in any certein place.
[Ad inveniendum lineam meridionalem per subtiles operaciones.]
Tak a rond plate of metal; [for warping, the brodere the bettre];
and make ther-upon a iust compas, a lite with-in the bordure; and
ley this ronde plate up-on an evene grond, or on an evene ston, or
on an evene stok fix in the gronde; and ley it even by a level.
5
And in centre of the compas stike an evene pin or a wyr upright;