Petri Gassendi De proportione, qva gravia decidentia accelerantvr. Epistolae tres
A 1646 Latin treatise by the astronomer and natural philosopher Pierre Gassendi, printed in Paris by L. de Hevqveville, setting out three letters on how falling bodies accelerate and on proportion. Its pictures are small woodcut ornaments, two decorative headpieces with a grotesque face framed by scrollwork, foliage and winged figures, and one geometric diagram of a triangle divided by labelled horizontal lines, which a designer could draw on for compact emblematic borders and for line-based technical diagrams.
