In the spring of 1803, Meriwether Lewis began to purchase scientific and mathematical instruments for a pending expedition into the northwestern region of North America. Among the items he purchased from Philadelphia instrument maker Thomas Whitney were three pocket compasses and this silver
The Apple Macintosh introduced a graphic user interface (GUI) to the Apple line of computers. The idea had originated at Xerox's Palo Alto Research Center in the 1970s, but Xerox was slow to commercialize it. Apple proved far more successful when it introduced the Macintosh in January 1984, with
The family fallout shelter represents the public policy assumptions of the atomic age, namely, that with enough preparation, the American family and with it the nation's social and political fabric would survive a nuclear attack. This free-standing, double-hulled steel shelter was installed benea
A picture book about the life of Florence Nightingale, a nurse who was dedicated to making hospitals clean and efficient. Through her life's work, she helped to make nursing an important and respected profession.
A traveling book about an adventurous young woman, Alice Ramsay, who drives across the country in 1909. Despite facing natural and manmade obstacles - including poor roads and a lack of traffic signs - Alice's westward voyage ends triumphantly in San Francisco, making this a charming tale of a gi
Explores five Puerto Rican festivals: The Calle San Sebastian Festival, the fiesta for Santiago Apostol, the celebrations during the Las Navidades, the patriotic festivals of Grito de Lares, and Puerto Rican Day in the United States.