Word: waterous
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Dates: during 1940-1949
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...spite of multiple obstacles, the Germans almost achieved a working pile. Their experimental models, made of uranium plates separated by heavy water, got better & better...
Urging the need to uphold the "principle of authority," the Government closed the school. But 900 students barricaded themselves in the grey stucco building, stayed there even when the Government cut off light, food, water. Outside, armed police, on horse and afoot, laid siege...
...Donato had lain for years on a miserable straw mattress in an attic room. At first he wept bitterly that he could not join in the daily life of his native San Nicandro Garganico (pop. 20,000). But gradually, the sounds of women singing as they carried water in copper vessels on their heads, the cries of the black-hatted mule-drivers, the hammering of cobblers in the tiny, dark shops (Donate had been a cobbler himself) lost their attraction for Donato. He heard them no more, because he was too busy reading the Bible...
They had been there themselves for five weeks, had even swum in the lagoon and drunk a little of its salt water...
...other possibility was to construct a chain-reacting pile made of uranium combined with some substance to slow down the neutrons shot out by its fissioning atoms. Theory indicated that carbon or heavy water would serve as this "moderator." The U.S. used carbon (graphite), but the Germans decided it would not do. This was a bad mistake; it led them to use heavy water, which could be produced only by a slow and costly process...