272 
This is most necessary when the microscope is being used at 
a high angle. The reflector is supported upon the rod (6), 
which turns, not too easily, in the socket (c), by means of 
the milled head (d), so that the reflector (2) may be placed 
at any angle desired, as shown by the dotted lines in fig. 3. 
The socket (c) is firmly fixed to a second rod (e), which 
turns somewhat tightly in the tube (f). The ring (g) to 
which the tube (f) is immovably attached serves to connect 
the apparatus with the eye-piece of the microscope, which 
may be done either before or after the object is arranged and 
focussed. If placed in position before the object is arranged, 
it can be turned on one side, so as to be out of the way, as 
indicated by the dotted lines in fig. 2. When it is desired 
to draw any object that is under the microscope, the reflector 
is turned into the position shown in fig. 11, until it receives, 
close to its thin upper edge, the pencil of light from the eye- 
piece. The ring (g) is now turned upon the eye-piece, until 
the upper edge of the reflector is exactly horizontal. By 
means of the milled head (d) the reflector should now be set 
at an angle with the drawing paper, this angle being just 
half the magnitude of that formed by the axis of the micro- 
scope and the paper. When thus arranged, which is accom- 
plished more rapidly than can be described, the instrument 
is used in exactly the same manner as the camera lucida; 
and any one familiar with the camera would find no difficulty 
1n 1ts use. 
For those persons who prefer drawing with the Beale 
neutral tint reflector, an ordinary thin cover glass! may be 
substituted for the “metallic mirror, and the apparatus ar- 
ranged as before, except that the pencil of light from the 
eye-piece need not fall upon the reflector close to its upper 
edge, as the drawing pencil can be seen through the glass ; 
whilst in using the metallic reflector, the eye must look over 
the thin edge in order to see the image of the object and the 
pencil at the same time. 
This apparatus may be used when the microscope is hori- 
zontal, or when nearly perpendicular, or at any angle between 
these two positions. It has also this advantage over the 
camera lucida, that the object which the microscope has 
reversed, is again brought into its natural position. 
1 There is no necessity for this to be tinted, as the light may be otherwise 
mederated. 
