Word: elements
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Dates: during 1960-1969
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...simple. It was called a "pile," and it was literally that-a 500-ton pile of carefully machined bricks made of pure graphite. Imbedded in some of the bricks, in a precisely calculated pattern, were little cubes of uranium or uranium oxide. Long control rods, plated with the metallic element cadmium, were so set up that they could be withdrawn from, or inserted into, deep holes in the graphite...
...create more nuclear fuel than they consume. Present-model nuclear reactors operate through fission of scarce and costly uranium 235. Natural uranium is mostly U-238; less than 1% of it is U-235. Breeder reactors would convert nonfissionable U-238 into fissionable plutonium, or convert the fairly common element thorium into fissionable U-233 (neither plutonium nor U-233 is found in nature). A few days before the 20th anniversary of the first chain reaction, AEC announced that its experimental plutonium reactor had achieved a self-sustaining reaction, verifying that plutonium can be used as fuel in a power...
...Human Element. The Idlewild crash was the seventh in a week, and it caused an increase in the already considerable amount of talk and argument about air safety...
...Young Democrats have had similar problems. Last year a group of Lowell House activists tried to combine with Dunster members in an effort to wrest control of the club from the Quincy element. The attempt, which was only partially successful, was made for purely House, rather than ideological commitments...
Other surprises have marked this 86-year old series--for instance the unprecedented 54 to 0 rout perpetrated by Yale in 1957. This element of the unexpected, always present in a game whose outcome rests traditionally on the uncertain factor of morale, has made the Harvard-Yale rivalry the greatest in college football...