Description: The 19th century was a transformative time for the natural sciences. New discoveries didn't just happen in an armchair. Scientists adventured into unfamiliar territory by land and sea on expeditions, and their new findings fed new theories. Groups like the Columbian Institute for the Promotion of Arts and Sciences and the National Academy of Sciences formalized America's place
Description: On this day in 1850, a young man was killed in the Castle, the first of four deaths to occur within its walls. William H. Page was working in the building, which was still under construction at the time, when he fell to his death.
Description: Attend today’s virtual historic film screening in commemoration of the hundredth anniversary of the ratification of the 19th Amendment! [via UCLA Film & Television Archive] [edan-image:id=siris_arc_397460,size=350,center]Got an itch to meet the Smithsonian’s resident mosquito expert? [via Smithsonian Voices]The New York Public Library podcast explores the life’s work and
Description: The term “personal equation” came into use in the 19th century as scientists found that observers have inherent biases: some anticipate events, and some report events after they have occurred. Recognition of the problem led to a spate of personal equation instruments: some measured biases of this sort, and some reduced the effect of personal errors. Most of these
Description: On January 24, 1925, for the first time in over a century, a total solar eclipse would be visible across the northern part of the United States. How scientists used a dirigible to observe the phenomenon.
Description: On the evening of October 1, 1847, while using a small telescope on the roof of the family home, Maria Mitchell (1818-1889) spotted a comet where one had not been before. Word of this achievement spread quickly through the scientific community. The American Journal of Science declared her “the first American entitled to the honor of the original discovery of a comet.” Some
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