MICROSCOPES, NAMELY INVERSE MICROSCOPES, AND ACCESSORIES THEREFOR, NAMELY MICROSCOPE EYEPIECES, MICROSCOPE OBJECTIVES, MICROSCOPE CONDENSORS, MICROSCOPE FILTERS, MICROSCOPE FILTER UNITS, MICROSCOPE TUBES, MICROSCOPE TABLES, MICROSCOPE ILLUMINATING UNITS INCLUDING MICROSCOPE DARK FIELD ILLUMINATING UNITS AND MICROSCOPE PHASE CONTRAST ILLUMINATING UNITS