Robert Boyle (January 25, 1627 – December 30, 1691) was an Irish natural philosopher, chemist, physicist, inventor and early gentleman scientist, noted for his work in physics and chemistry. Although his research and personal philosophy clearly has its roots in the alchemical tradition, he is largely regarded today as the first modern chemist. Among his works, The Sceptical Chymist is seen as a cornerstone book in the field of chemistry.