Word: 000ths
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Dates: during 1940-1949
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...speck which the General could not see was plenty for the chemists. Working with solutions measured in microlitres (7,000ths of a teaspoon), they accurately determined plutonium's chemical properties. Then they devised a complex process for separating it from the fiercely radioactive by-products of the uranium-plutonium pile at Hanford, Washington. The pile produced at least ico different byproducts. Most are unstable isotopes of familiar elements (the same periodic numbers but different atomic weights...
...Edwards Johansson, 79, Swedish-born father of hair-splitting precision gauges; in Eskilstuna, Sweden. Be ore he was 32, the shaggy-browed toolmaker hand-forged and hand-polished blocks of steel so internally stressless, externally flawless that they could detect a machinist's error to within 2,000,000ths of an inch (a 2,000,000th is to an inch as an inch is to 31.6 miles). Nicknamed "Jo" blocks, they made possible mass production's interchangeability of parts...