26 CAMERAS, REVOLVING STAGES FOR MICROSCOPES, MOUNTING BASES FOR MICROSCOPES, MICROMETER MEASURING STAGES, CAMERA ATTACHMENTS FOR MICROSCOPES, ALIGNING FIXTURES FOR USE WITH MICROSCOPES, AND MICROSCOPES INCLUDING STEREOSCOPIC MICROSCOPES WITH BEAM SPLITTERS, POLARIZING MICROSCOPES, MICROSCOPES WITH PROJECTORS, TOOLMAKING AND METALLURGICAL MEASURING MICROSCOPES,WITH CAMERS ATTACHMENTS.