The Smithsonian’s National Museum of American History has accepted the donation of the papers of the late inventor Jerome H.

This 6-3/8" brass rule unfolds to form a set square. The outer edge of one leg has a centimeter scale numbered by ones from 1 to 16. It is marked: Nelle Mesure. The outer edge of the other leg has a ...

In 1620 an English mathematician and astronomer named Edmund Gunter described a surveyor's chain with 100 links, measuring 66 feet (22 yards or 4 poles) overall. By this design, one square chain ...

A label on this electric sterilizer reads “RENWAL / 120 VOLTS A. C. ONLY / STARTS 5 AMP. / RUNS 2 AMP. / STERILIZER No. 5 / PROTECTED BY US PATENTS / 2158692 / 2158698 / 223023[?] / 2230245 / ELECTRIC ...

This photograph shows Lucy Branham with a banner protesting the treatment of suffrage leader Alice Paul. In January 1917, discouraged by President Wilson’s continued opposition to the suffrage ...

In 1896, William McKinley became the Republican presidential nominee in the midst of an economic crisis that had been going on for three years. In response, one of his campaign slogans was a “full ...

The indications or uses for this product as provided by the manufacturer are: The delicious flavor of this safe and efficient dentrifice makes it easy to form the important habit of brushing the teeth ...