Ruolin Wu*
Isaac Newton's book Philosophiae Naturalis Principia Mathematica (1687), whose title means "Numerical Principles of Natural Philosophy", mirrors the then-current utilization of the words "normal way of thinking", much the same as "deliberate investigation of nature". Indeed, even in the nineteenth century, a composition by Lord Kelvin and Peter Guthrie Tait, which characterized quite a bit of present day physical science, was named Treatise on Natural Philosophy (1867). In the German custom, Naturphilosophie (reasoning of nature) endured into the eighteenth and nineteenth century as an endeavor to accomplish a theoretical solidarity of nature and soul.