Used with
permission of Maiken Naylor, University at Buffalo, Buffalo, NY, USA,
http://ublib.buffalo.edu/libraries/units/sel/exhibits/stamps
Robert Boyle (1627-91), British physicist and chemist, formulated Boyle's Law for an ideal gas: at constant temperature, pressure and volume are inversely proportional. With Robert Hooke, he developed an improved air pump (shown on the stamp) based on von Guericke's designs. Boyle was foremost an experimentalist who recorded data so that experiments could be reproduced, in what is now called the scientific method.