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By Alfred North Whitehead

Alfred North Whitehead (1861-1947) used to be a trendy English mathematician and thinker who co-authored the hugely influential Principia Mathematica with Bertrand Russell. initially released in 1919, and primary republished in 1925 as this moment version, An Enquiry in regards to the ideas of usual wisdom ranks between Whitehead's most crucial works; forming a standpoint on clinical statement that included a posh view of expertise, instead of prioritising the location of 'pure' experience information. along better half volumes the concept that of Nature (1920) and the primary of Relativity (1922), it created a framework for Whitehead's later metaphysical speculations. this is often a big e-book that might be of price to an individual with an curiosity within the dating among technological know-how and philosophy.

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Accordingly with the assumption of an ether of material the negative results of the various experiments are explained by an ad hoc hypothesis which appears to be related to no other phenomena in nature. 6 There is another way in which the motion of matter may be balanced (so to speak) against tne velocity of light. Fizeau experimented on the passage of light through translucent moving matter, and obtained results which Fresnel accounted for by multiplying the refractive index of the moving medium by a coefficient dependent on its velocity.

Galileo and the Inquisition are only in error in the single affirmation in which they both agreed, namely that absolute position is a physical fact-the sun for Galileo and the earth for the Inquisition. 7·2 Thus each rigid body defines its own space, with its own points, its own hnes, and its own surfaces. Two bodies may agree in their spaces; namely, what is a point for either may be a point for both. Also if a third body agrees with either, it will agree with both. The complete set of bodies, actual or hypothetical, which agree in their space-formation will be called a 'consentient' set.

The third lll,w of motion consIders a fundamental characteristic of force and is founded on the sound principle that all 28 . r. THE TRADITIONS OF SCIENCE ( agency is nothing else than relations between those entities which are among the ultimate data of science: The law is, ActlOn and reaction are equal and opposite. This ;neans that there must be particles p', pH, pm, etc. to whose agency (Xllp, Y llp , Zap) are due, and that we can write Xap= X llpp' + Xapp" + ... pp" + r' • • •••• (2) Zilp = Zapp' + Zapp" + ...

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