PASCAL, Blaise. Traitez de l' Equilibre des Liqueurs et de la Pesanteur de la Masse de l' Air, Paris, chez Guillaume Desprez, 1663, 12°, FIRST EDITION, 2 folding engraved plates (one torn with loss to border and repaired), woodcut on E5 (A1 and E3 torn with some loss of text, restored title with ownership inscription excised and accession no. on verso), contemporary speckled calf (chips to spine and gouge mark on upper cover). [Tchemerzine IX, p. 63; Honeyman Pt. VI, lots 2413 and 2414]
Dibner Heralds of Science 143: "In this small, posthumous volume, Pascal correlated hydrostatics and aerostatics by simple demonstrable relationships and banished the myth that 'nature abhors a vacuum.' Using the recently invented Torricellian barometer, Pascal had his brother-in-law climb the Puy de Dome in 1648 and watch the barometer level fall with the ascent, thereby demonstrating that air had weight, like, he stated, a blanket of wool 20 or 30 fathoms high. The relationship of barometric change and change in the weather was first outlined here ...."