Compound monocular microscope set with two monocular body tubes
1825-1850
Binocular microscope with parallel body tubes of adjustable separation
1850-1870
Monocular and binocular microscope
1869
Dery comparison microscope
1885-1895
Twin demonstration microscope invented by James of Salford
Binocular microscope with divided objective
1870-1890
Binocular microscope by Smith & Beck
1850-1860