GALILEO

the great Italian scientist, was bom in 1564. He discovered a number of valuable mathematical and scientific principles and greatly developed^ their application, c.g. in regard to the hydrostatic balance, thermometer, magnet, telescope, etc. He detected the satellites of Jupiter, the ring of Saturn, and the spots on the sun. He proved the superiority of the Copemican over the Ptolemaic theory, and was imprisoned for doing so. He died in 1642, the year of Newton’s birth.