smithsonianlibraries: The first round of Smithsonian’s Summer Showdown ends today! Did you vote for our Galileo letter yet? Not any ordinary letter, he describes a water-clock driven by a mysterious magnetic force and references his house arrest and

smithsonianlibraries: The first round of Smithsonian’s Summer Showdown ends today! Did you vote for our Galileo letter yet? Not any ordinary letter, he describes a water-clock driven by a mysterious magnetic force and references his house arrest and

smithsonianlibraries: The first round of Smithsonian’s Summer Showdown ends today!