TRUMPET, Marine, an old musical stringed instrument, said to derive its name from its inventor Marino or Marigni. Mersenne describes it as a monochord and as a diachord. See his Harmonicorum libri xii. Paris, 1652, proposition 37 of book 2d, pp. 56, 57, 58. It was played with a bow, and the sounds were stopped by the fingers gently touching the string, so as to produce the harmonics of the string, in the same manner as is practised on the violin, &c. The loud, harsh, and peculiar tone of the trumpet-marine was increased by the bridge being fixed by one end only to the sound-board, while the other end was free, and allowed to strike against the sound-board, according to the vibration of the string, &c. The sounds above the fundamental of the open string, followed those of the aliquots mentioned in article Music. The reader may consult an ingenious paper upon the marine trumpet in the fourth volume of the late Professor Robison's Mechanical Philosophy, edited by Dr Brewster in 1822, pp. 486-500.