1884—Scotland
Frederick Niecks, a German music scholar who spends the bulk of his career in Scotland, holding positions in the Mackenzie String Quartet and, later, at the University of Edinburgh, writes his Concise Dictionary of Musical Terms. In the trombone entry, he specifies the key of the alto trombone (“alto trombone in the key of E flat”) and makes the common connection with alto clef: “The alto trombone is generally noted in the alto clef.” He also points out, “Three is the usual number of trombones employed in the orchestra. But the bass trombone is becoming more and more rare, and instead of it a second tenor trombone is frequently employed. In France we find even three tenor trombones. Besides the slide trombones there are also valve trombones, which, however, are inferior with regard to tone” (Niecks 246).