Projection Apparatus (1917)

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Bausch & Lomb Optical Company Projection Eyepieces use with the 16 mm objective and all Our projection eyepieces are of achro- matic construction and project an image superior in every way to those given by ordinary eyepieces. We recommend for >her powers. Reflecting Prism Attachable Mechanical Stage The mechanical stage enables one to examine a slide area con- veniently and accurately and to permanently locate special areas by means of the scale readings. The model offered attaches to the corners of any square micro- scope stage by means of an adjustable clamp. The move- ments are by rack and pinion, the adjustment heads being close together in fixed relative position. One scale reads 75 mm and the other 55 mm, the range available being dependent upon the size of the microscope stage. The scales of both move- ments are graduated in single millimeters with verniers reading to tenths. The main parts are lacquered black to avoid reflections. The scales are engraved on fine German silver. 114