Photographic Appliances and Supplies-Namely, Microscopes, Projectors, Micro-Projectors, Micro-Objectors, Micro Metallographs (Apparatus for Recording on Photographic Film or Plate Microscopic Images of the Structure of Metal), Panphots (Photomicrographic Apparatus); Carbon Meters, Microscope Heating Stage and Manipulators (Microscope Accessories which Permit the Object to be Held at Desired Temperatures), Microscope Lamps, X-Ray Film Projectors, Photometers, Object Markers (Articles Shaped Like a Microscope Objective but with a Diamond Point which can be Used to Describe a Circle Around Any Particular Area on the Microscope Slide), Demonstration Eyepieces, Comparison Eyepieces, Vertical Illuminators (Articles Used in Conjunction with Microscopes for Opaque Objects), Magnifiers, Micrometer Eyepieces, Cameras, Lenses, View Finders, Range Finders, Filters, Sunshades, Tripod Heads; Supplementary Camera Accessories-Namely, a Rapid Winder for the Shutter of the Camera to Increase the Speed of Taking Pictures, Spring Winders, Stereo Apparatuses, Photoflash Units, Carrying and Protective Cases, Negative Viewers, Negative File Systems Comprising Metal or Wooden Boxes with Partitions for Storing Therein in a Selected Order Photographic Negatives; Cable Releases, Film and Slide Printing Apparatuses, Enlarging Apparatus for Copying Manuscripts, Documents, Blue Prints and Pictures with the Aid of a Camera; Enlarger Easels; and Binoculars, Spectroscopes, Dilatometers, Titraters, and Colorimeters