Title page of 'Il Saggiatore' (The Asayer), by Galileo, 1623.
© Science Museum / Science & Society Picture Library
The dedication is flanked by female allegorical figures personifying Natural Philosophy and Mathematics. 'The Asayer', published by the Lincean Academy in 1623, is considered one of the greatest polemics in science. Galileo Galilei (1564-1642) addresed the book to Virginio Cesarini who wrote to Galileo in 1619 praising him for showing him the road of truth. In this book Galileo suggested a general scientific approach to the investigation of celestial phenomena. Italian astronomer and physicist Galileo is one of the greatest scientists and his achievements include the discovery of Jupiter's moons and the laws governing falling bodies.