Word: lorentz
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Dates: during 1930-1939
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...than he. But from a very few observations-the constancy of light's speed in space and the equivalence of gravitational mass and inertia-he divined how the cosmos was made. He did not, like Newton, invent mathematics to describe it but borrowed the mathematics of Riemann, Fitzgerald, Lorentz and Minkowski...
Words followed words. "Four dimension vector . . direct from Lorentz transformation . . . sum of impulses before and after collision . . . relative to all systems of coordinates. . . ." Sometimes the speaker lapsed into German, once or twice asked his hearers to translate a German technical word...
Last week Dr. Einstein derived the same old equation, E = MC², without using the Maxwell electromagnetic equations as he did originally. First he showed how four-dimensional Relativistic equations were derived from ordinary three-dimensional equations by means of a mathematical bridge called a Lorentz transformation. Then he applied the four-dimensional equations to inelastic collisions between particles. Such particles do not bounce but stop dead at contact, and therefore lose the extra mass represented by their energies of motion. But with the change of mass there is a change of energy, and, as the blackboard showed...
...Editor Lorentz gives major space to New Deal economic experiments, labor troubles, Russian recognition; prints President Roosevelt's picture 18 times. The book borrows frequently and happily from the omnipresent newsreels, more frequently but less happily from plate photographers. Rivers and dams, airviewed and minuscule, announce the Tennessee Valley Administration; nine scenes in Russia herald its recognition. Good shots: Assassin Zangara looking pleased with the headlines; a laughing lynch-crowd in California; empty freight-cars in a yard. Grisly shot: the naked, charred body of Negro Warner, lynched & burned near St. Joseph...
...Editor Lorentz paces his captions to the measure of war, does a thorough piece of reporting in his running commentary on last year's history. Not comparable to Stallings' book in power, Lorentz's picture-book suffers from a weakness inherent in last year's biggest story: economic theories cannot be photographed...