in 1675, Boyle hired a new assistant, a French medical doctor named Denis Papin. Papin continued the air-pump experiments, but added a twist. He was curious if he could add a piston to the pump and somehow create a working cycle of compression and decompression. In 1687, Papin published a book describing how to use the Hooke-Boyle air pump to cook food. He called his new device a “Digester of Bones,” since it squashed bones into edible bits.
