December 1, 2008 After the close of WWII, Russian schoolchildren presented the U.S. ambassador with a “gesture of friendship” in the form of a two-foot wooden replica of the Seal of the United States.

V.—Brass Instruments and the Low “F.” LEAVING the pendulums which have only two vibrations at a time, the case of brass instruments with a number of simultaneous vibrations was next considered. It is ...

Although the sensitivity and performance of microphones has improved quite a bit since Alexander Graham Bell first patented them, they still have one big drawback that researchers from Carnegie Mellon ...