Galileo Galilei, the oldest son of the…
1585 CE
Galileo Galilei, the oldest son of the musician Vincenzo Galilei, had moved with his family from Pisa to Florence in the early 1570s, where the Galilei family had lived for generations.
Galileo had attended the monastery school at Vallombrosa, near Florence, in his middle teens and in 1581 matriculated at the University of Pisa, where he was to study medicine, but, now become enamored with mathematics, had decided against the protests of his father to make the mathematical subjects and philosophy his profession.
He had first noted the constancy of a pendulum's period around 1583 by comparing the movement of a swinging lamp in a Pisa cathedral with his pulse rate.
Galileo now began to prepare himself to teach Aristotelian philosophy and mathematics, and several of his lectures have survived.
Galileo left the university in 1585 without having obtained a degree, and for the past few years he has given private lessons in the mathematical subjects in Florence and Siena.
He has meanwhile designed a new form of hydrostatic balance for weighing small quantities and written a short treatise, La bilancetta (“The Little Balance”), that circulates in manuscript form.
He also begins his studies on motion, which he will pursue steadily for the next two decades.