Optics of the Bouquette compound microscope. A: Eyepiece; B: drawtube; C: multi-lens objective, that screws into the nosepiece.
The eyepiece consists of two lens elements. Both are plano-convex, with the flat surface facing the eye. The front element may be an achromatic doublet.
Objective with the front magnifier removed.
Assembled objective lens.
Brass objective storage cases. Right case ("8") is missing it's objective.