Daniel Bernoulli ( 1700 - 1782 ), son of Johann II Bernoulli, was born in the Groningen, Netherlands.  At the age of 13, Daniel was sent to Basel University to study philosophy and logic.  Later he obtained his master's degree in philosophy at the age of sixteen.  Although Daniel was interested mainly in mathematics, his father pushed him into the medical field where he could profit the most.  Again, Daniel attended Basel and other colleges around Europe where he obtained his doctorate in medicine in 1720. While studying medicine in Venice, Daniel published his first book entitled Mathematical Exercises.  Daniel soon became interested in fluid flow while working with the flow of blood and blood pressure. With the help of the famous scientist Euler, Daniel published his most famous book Hydrodynamica in 1738.  In this book Daniel discusses equilibrium, pressure, and speed in fluids which led to Bernoulli's principle.  Read on to find out about his principle.