The early form of the Trombone -it may date back to 1000 AD The 15th century English preferred to call it sackbut It actually looks quite similar to the Trombone of today with the exception of the flared bell The flare on today's Trombone was not adapted until 1740 By the Romantic period, the newly refined Trombone gave it a louder, more expressive character and found itself in many orchestral compositions
\Sack"but\, n 1: A medieval musical instrument resembling a trombone 2: A Syrian stringed instrument resembling a harp (Dan 3: 5, 7, 10, 15); Not the modern sackbut
A brass wind instrument, like a bass trumpet, so contrived that it can be lengthened or shortened according to the tone required; said to be the same as the trombone