<p>2017 Reprint of 1925 Second Edition. &nbsp;&nbsp;Whitehead (1861&ndash;1947) was a prominent English mathematician and philosopher who co-authored the highly influential <em>Principia Mathematica</em> with Bertrand Russell. Originally published in 1919 and first republished in 1925 as this Second Edition this work ranks among Whitehead&#39;s most important works; forming a perspective on scientific observation that incorporated a complex view of experience rather than prioritizing the position of &#39;pure&#39; sense data. Alongside companion volumes <em>The Concept of Nature</em> (1920) and <em>The Principle of Relativity</em> (1922) it created a framework for Whitehead&#39;s later metaphysical speculations. This is an important book that will be of value to anyone with an interest in the relationship between science and philosophy.</p>