The Research Microscope is
constructed after an entirely new pattern. It has a neatly japanned
iron arm and base, the latter inlaid with soft rubber pads, and of
such construction and weight as to counterbalance the instrument at
any inclination of its body. Finely finished brass pillars supporting
the axis, which permits the body to incline at any angle. The tube has
nickeled inner draw tube, giving a range of three inches. Coarse
adjustment by rack and pinion; fine adjustment by micrometer and screw
acting on our patent fine adjustment. This new style of fine
adjustment is a peculiar feature of all our higher priced microscopes.
It consists of two parallel blades of thin spring steel, placed one
above the other , each fastened with one end to the arm, with the
other to the body, and acted upon by a fine micrometer screw attached
to a lever protruding from the body, by means of which the latter may
be raised or depressed, with extraordinary delicacy of adjustment. It
has no lost motion, and, having no friction, is not liable to
deterioration. The stage is made of brass, and is made as thin as is
consistent with firmness and freedom from tremor. The mirror bar is
hung on a point placed above the stage and between this and the arm.
It swings to any obliquity and any angle above the stage for the
illumination of opaque objects. With 1 "B" eyepiece and two
objectives, 1 inch and 1/4 inch, camera lucida, and black walnut
case....$45