Niccolò Cabeo, SJ (also known as Nicolaus Cabeus; February 26, 1586 – June 30, 1650) was an Italian Jesuit philosopher, theologian, engineer and mathematician.

When the air returned to its original location, it carried light bodies along with it making them move towards the attractive material.

Both Accademia del Cimento and Robert Boyle performed experiments with vacuums in attempts to confirm or refute Cabeo's ideas.

In this work, he carefully examined a number of ideas proposed by Galileo Galilei, including the motion of the earth and the law of falling bodies.

Cabeo also discussed the theory of water flow proposed by Galileo's student, Benedetto Castelli.