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From the February 20, 1932, issue
LIGHT FLOODS MONUMENT FOR CELEBRATION Science and engineering are aiding the Washington Bicentennial celebration, for they have just joined hands to illuminate in a very realistic fashion the famous obelisk that is named for the father of his country. The striking photograph of the shaft and its reflection in the Lincoln Memorial pool shows how […]
- Math
Math Class Artifacts
Do you recall the 7-foot-long slide rule that used to hang above the blackboard in math class? Ever wonder who invented graph paper? Have you worked with a geoboard? The Smithsonian’s National Museum of American History has put together an exhibit displaying tools used to teach mathematics in the United States from the 1800s to […]
- Health & Medicine
Indoor tanning ups all skin cancer rates
Artificial sunbathing using ultraviolet lights increases the risk of all types of skin cancer.
