Steam digester Torricelli and further developed by German scientist Otto von Guericke with his Magdeburg hemispheres. Guerike's demonstration was documented by Gaspar Schott, in a book that was read by Robert Boyle. Boyle and his assistant Robert Hooke improved Guericke's air pump design and built their own. From this, through various experiments, they formulated what is called Boyle's law, which states that the volume of a body of an ideal gas is inversely proportional to its pressure. Soon the ideal gas law was formulated. Based on these concepts in 1679 a Boyle's associate, named Denis Papin, built a "bone digester", which is
The Frogs Who Desired a King The Frogs Who Desired a King The Frogs Who Desired a King is one of Aesop's Fables and numbered 44 in the Perry Index. Throughout its history, the story has been given a political application. According to the earliest source, Phaedrus, the story concerns a group of frogs who called on the great god Zeus to send them a king. He threw down a log, which fell in their pond with a loud splash and terrified them. Eventually one of the frogs peeped above the water and, seeing that it was no longer moving, soon all hopped upon it and