A Dictionary of Music and Musicians/Sommerophone
SOMMEROPHONE. An instrument of the saxhorn or bombardon class, named after its inventor. It will be remembered as largely played in the Crystal Palace of 1851. 'The Euphonic horn of Herr Sommer' is honourably mentioned in the Reports of the Juries (pp. 331, 335) as 'an instrument of great power as well as sweetness of tone.' It possessed no very special peculiarities, and is now seldom, if ever, used.
[ W. H. S. ]