Compound monocular microscope with extendable pillar, clamp and two side legs, for aquarium use, by Nachet and Son, 17 rue St. Severin, Paris, France, 1863-1875. Compound monocular microscope with extendable pillar 1863-1875
Drawing camera lucida of Wollaston-Ross pattern, signed by Dollond, English, mid 19th century Drawing camera lucida of Wollaston-Ross pattern 1831-1870