Word: lorentz
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History. Government departments, notably that of Agriculture, have made many a dull, amateurish film to be shown to school children. To Dr. Rexford Guy Tugwell's Resettlement Administration nearly a year ago went Cinema Critic Pare Lorentz (Judge, McCall's) with an idea: Let the U. S. Government, heretofore backward in using the cinema, make a really good picture of the history of the Great Plains, showing how part of it became a dread "Dust Bowl" and how the Resettlement Administration was trying to rehabilitate its farmers. Critic Lorentz sold his idea, was at once chosen to direct...
...Lorentz and his crew filmed grass, cattle, dust in half a dozen western States, wound up in California. Farmers performed easily before the camera, found nothing odd in re-enacting their personal tragedy. At one point Photographers Steiner, Strand and Hurwitz grew fretful because The Plow That Broke the Plains was not forceful enough. When they saw the finished job. however, they withdrew objections. By that time two more notable names were on the film's credit list, on the Federal payroll: Composer Virgil Thomson (Four Saints in Three Acts), who provided a musical score, and Alexander Smallens...
...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...