description of the two former only, both which are easie to be
done.

[Footnote 2: Of this Hypothesis see _Wrights_ errors of
navigation.]

1 To describe an Æquinoctiall planispheare, draw a circle
(_ACBD_) and inscribe in it two diameters (_AB_) & (_CD_) cutting
each other at right angles, and the whole circle into foure
quadrants: each whereof devide into 90. parts, or degrees. The
line (_AB_) doth fitly represent halfe of the Æquator, as the
line (_CD_) in which the points (_C_) & (_D_) are the two poles,
halfe of the Meridian: for these circles the eye being in a
perpendicular line from the point of concurrence (as in this
projection it is supposed) must needs appeare streight. To draw
the other, which will appeare crooked, doe thus. Lie a rule from
the Pole (_C_) to every tenth or fift degree of the halfe circle
(_ADB_) noting in the Æquator (_AB_) every intersection of it and
the rule. The like doe from the point (_B_) to the semicircle
(_CAD_) noting also the intersections in the Meridian (_CD_) Then
the diameters (_CB_) and (_AB_) being drawne out at both ends, as
farre as may suffice, finding in the line (_DC_) the center of
the tenth division from (_A_) to (_C_) and from (_B_) to (_C_), &
of the first point of intersection noted in the meridian fr[~o]
the Æquator towards (_C_) by a way familiar to Geometricians
connect the three points, and you haue the paralell of 10.
degrees from the Æquator: the like must bee done in drawing the
other paralells on either side, the Æquator; as also in drawing
the Meridians from centers found in the line (_AB_) in like maner
continued. All which is illustrated by the following diagram.