A spectroscopic instrument (1) comprising at least one load bearing anti-vibration foot portion (3) for supporting the instrument on a surface. Each foot portion (3) comprises a load bearing elastomeric portion (5) and an internal stub portion (4) which is provided within the elastomeric portion and which is rigid compared to the elastomeric portion. An internal wall of the elastomeric portion (5) is spaced from an external wall of the stub portion (4) such that the elastomeric portion (5) is moveable relative to the stub portion (4) to absorb vibration. Liquid is provided in the spacing between the internal wall of the elastomeric portion (5) and the external wall of the stub portion (4) to damp such movement.