There is no philosophy which is not founded upon knowledge of the phenomena, but to get any profit from this knowledge it is absolutely necessary to be a mathematician.

In particular they wanted to know about the relationship between the speed at which blood flows and its pressure. After a brief period in Frankfurt the family moved to Basel in Switzerland. When Daniel was seven his younger brother Johann II Bernoulli was born.

He is particularly remembered for his applications of mathematics to mechanics especially fluid mechanics and for his pioneering work in probability and statistics. Daniel Bernoulli (pron.