Kathleen Schlesinger, 1911 Encyclopædia Britannica, Volume 6… (1911)
“ The clarina is a metal instrument with the conical bore and fingering of the oboe and the clarinet single-reed mouthpiece. The compass of the instrument is as shown, and it stands in the key of B♭. Like the clarinet, the clarina is a transposing instrument, for which the music must be written in a key a tone higher than that of the composition. The timbre resulting from the combination of conical bore and single-reed mouthpiece has in the lowest register affinities with the cor anglais, in the middle with the saxophone, and in the highest with the clarinet. ”
