Microscope for mineralogical and petrographical research
Microscope for mineralogical and petrographical research. With accessories: six objectives, four eyepieces (two with micrometer scales & two with cross threads), Bertrand Haederon's eye pieces, quartz selenite and quarter undulation plates in brass mounts, objective micrometer scale, two condensing lenses (these comprise diaphragm & adjusting ring), five additional pieces, two boxes, brass spanner