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 miller who was a wizard, a cheat and a matchmaker parents cannot decide to whom to marry her; the mother seeks a nobleman, the father a farmer. Act II: Filimon explains to Anyuta that he has enlisted Fadei's support. Fetinia, rating Fadei's skills as a fortune-teller, asks who Anyuta's husband will be. The miller sends her on a stroll and says that it will be a gentleman, the first person she will meet on her path. (Filimon, of course). Meeting Ankudin, Fadei assures him that his daughter's husband will be a working farmer. When Fetinia and Ankudin meet they quarrel over the apparently incompatible promises given to them by the