Fig 1. Boyle's law implies that if a quantity of an ideal gas is to be compressed at constant temperature so that its volume is reduced by one half (from v to v/2) its pressure must be doubled (from p/2 to p).
Fig 2. The inverse relationship between pressure and volume is evident in this diagram.
pv = constant.
The French physicist, plant physiologist, and priest Edmé Mariotte (1620–84) discovered the law independently in 1676, and in France it is known as Mariotte's law. (Mariotte, a founder of the Academy of Sciences in Paris) also concluded that plants synthesize materials by chemical processes, a theory verified after his death.