One of two telephones used by Alexander Graham Bell in a demonstration that took place between Boston and Salem, Massachusetts on November 26, 1876. Critical features are the iron diaphragm (seen as a black circular disc mounted on the vertical wooden support), two electromagnets (seen in white,

The portability of cellular telephones provides users with the ability to make calls from almost anywhere and Motorola was built on portability. The company made car radios in the 1930s and portable radios called walkie-talkies for the U.S. military during World War Two, and played a major role i

The monarch butterfly wings have morphed into a well-recognized symbol of the immigrant rights movement in less than a decade. Just as a monarch butterfly migrates across North America to find refuge (to from harsh weather), so do humans to find a better living situation. Popularized by Culture Stri

These shoes, worn by dancer Stella Abrera in a January 2018 production of The Nutcracker, have been pancaked to match Abrera's skin color. When they are dancing without wearing tights, dancers pancake their shoes to match their skin color.Stella Abrera joined the American Ballet Theatre in 1996 and

Physical Description Black felt, grosgrain ribbon, ostrich feathers, and gold cockade, which is a ribbon rose or knot. Specific History Admiral Dewey is often pictured wearing his chapeau bras. General History A chapeau bras is a type of hat made

The astrolabe is an astronomical calculating device used from ancient times into the eighteenth century. Measuring the height of a star using the back of the instrument, and knowing the latitude, one could find the time of night and the position of other stars. The openwork piece on the front, ca

This early respirator for producing artificial respiration over long periods of time was designed and constructed by the donor, John Haven Emerson. Completed in July 1931, it was first used in the summer of that year at the Providence City Hospital, Providence, R.I...

Part of a Pullman porter's job was to make up the sleeping berths in his assigned sleeping car, and to provide extra blankets to passengers requesting them. The standard Pullman blanket in the 20th century was dyed a salmon color, which became almost a trademark of the company. When a blanket bec

Virginia Lee Mead wore this salmon-pink silk satin dress when she was a young woman living in New York City's Chinatown, where her father, Lee B. Lok, a first-generation immigrant, ran a general store. The full-length dress is a traditional style that younger second-generation Chinese women wore

The National Park Service offers distance learning, field trips, and curriculum materials in addition to accredited professional development opportunities for teachers.  Look here for opportunities to visit guest speakers, borrom nature kits, plan trips, and explore the American outdoors.