A Jones 'Improved' Compound Microscope

English, c.1800, engraved to the top of the body tube 'W & S Jones, 30 Holborn London' the microscope on a polished mahogany base, large brass boss with square section, plano concave mirror in a gimbal on a sliding collar, cruciform stage with rack and pinion focusing, limb to the top with screwthread to accept the body tube and the objective lenses, drawer contains 2 Leiberkuhn objectives, a wheel of objectives, a Leiberkuhn & holder, a Bonnani type stage, condenser, frogplate, wet cell, cone diaphragm, all in the original pyramid-shaped mahogany case, case height 38cm.