The Bass Clarinet
The bass clarinet sounds one octave deeper than the clarinet in Bb. It had been made in several different shapes, for example bassoon-shaped or curved.The bass clarinet was invented to replace the bassoon in military bands, because musicians were searching a louder instrument with stronger bass notes.
(96) Bass clarinet in Bb, with simple system using Boehm F#, by H. Douglas in Glasgow, c 1870 (bassoon shaped).
(97) Bass clarinet in Bb with simple system using Boehm’s mechanism for R1 and R2, made by Boosey & Co. in London, 1901 (curved).
From the Edinburgh University Collection of Historic Musical Instruments