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“
First editions of these mathematical, geometrical, and astronomical treatises to be
used as the basis of lectures to university students... This is the first edition with
Clichtove’s commentary... Clichtove’s
Praxis numerandi
, devoted mainly to the
theory of numbers, gives an elaborate theory of ratios and figure numbers. The
Introductio in geometriam
of Charles Bovelles - the first geometrical work published
by a Frenchman - includes a discourse on the quadrature of tht circle, the cubation of
the sphere, perspective, etc. Lefevre’s
Astronomicon
a brief introductory textbook on
astronomy, contains a prefatory letter to Germain de Ganay, in which Lefevre draws
a sharp distinction between the false astrology of seers and “ horoscope-makers” and
the true science of the heavenly bodies
” (Schreiber).