A 19th-Century brass monocular drum-type microscope, signed Secker A PARIS N 30, with rack and pinion focusing and objectives, the drum base incorporating stage and mirror - 13in. (33cm.) high; and a part solar microscope signed on the body tube Microscope Solaire Achromatique de Charles Chevalier Ingenieur Opticien Brevete Palais Royal 163 a Paris, the part microscope includes the sprung stage, rack and pinion operated objective mounting with 3 simple objectives and eyepiece.