Word: blackboarding
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Last week a stumbling block was placed in the National Committee's way when Attorney General Cummings warned that its blackboard users might be prosecuted for violating a Federal law. The law, an obscure one passed in 1918, states that anyone may be fined $1,000 and imprisoned for one year, if, in making a sale or lease, he ascribes any part of the price to a Federal tax. The Attorney General, who said his warning had been provoked by about a dozen complaints from the Midwest against Republican tax propaganda, had never heard of anyone being prosecuted under...
...years, retold the old story of Julius Caesar, his rise and fall. Though her version lacked the imaginative freshness of such historical novels as Robert Graves's on the Emperor Claudius or Lion Feuchtwanger's on Josephus, and neither added to nor subtracted from history's blackboard, it furnished modern readers with a stirring, up-to-date account of one of Rome's greatest true stories. Author Bentley also hoped that her factual record of ancient autocracy would point a moral for the present...
...throughout history. In raw form its principal use is as a retarder in cement, preventing it from setting too rapidly. It is also in wide industrial demand as a flux in smelting, as ''mineral white" or "terra alba'' in the paper, textile and paint trades. Blackboard chalk is raw, powdered gypsum molded with a binding substance. Pure gypsum is alabaster...
...curtain time drew near photographers mounted the stage to snap the packed, hand-picked audience. Some went backstage to get Einstein pictures. Outside six policemen held back a surging crowd of curious. The curtain went up on a stage empty but for a blackboard covered with equations chalked in different colors. Applause began. In the midst of it Dr. Einstein ambled from the wings, his halo of white hair glowing in the dim light...
...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 at the end of an hour, the two are precisely equal. When the lecture was over a newshawk scuttled up to the blackboard, seized the piece of chalk which Dr. Einstein had laid down, carried it off proudly as a trophy...