Two smaller images expand this theme of physics in its theoretical and practical incarnations. The Air Pump of Robert Boyle was an iconic and emblematic instrument in the seventeenth century. It proved and demonstrated many principles of the new physics, made possible a revolution in chemistry, and elucidated animal physiology. It was very popular with the general public, used in many demonstrations of physical discoveries. It led the way to many useful applications as well. Such pumps, while not very visible to us, are ubiquitous in our daily lives.