"Deleuil Simple Chemical Type Microscope"
This simple Chemical type microscope was first made by Louis Joseph Deleuil (1795-1862) on a design by the chemist François-Vincent Raspail (1794-1878) who is considered to be the Father of Histochemistry. While Deleuil was the first optician to make one of these simple microscopes, the design became very popular and was copied by several of the other French manufacturers. This model, also called a chemical microscope after Raspail or an aquatic.
The microscope has rack and pinion focussing. It can be used when set tight by a screw in a pocket on the mahogany case.
Good condition, a few minor scratches and tears.