H. INTRODUCTORY HISTOLOGICAL STUDY 
For the names of the parts of the microscope and explanation 
of the optical principles involved in its use, the student should 
consult the small book which accompanies each instrument. 
V- 
Directions to be Observed in the Use of the Compound Micro¬ 
scope. 
1. Lift the microscope stand by handle arm, or by base. 
Remove dust. If necessary, clean the oculars and objectives, 
using for the purpose only pure tissue paper or soft clean linen, 
applied with a rotary motion. Always take the greatest of care to 
keep the microscope lenses clean, and free from contact with 
any object. 
2. See that all parts of the microscope stand are properly 
and firmly adjusted, and that the nosepiece, and the coarse and 
fine adjustments by means of which the microscope tube is raised 
and lowered, are in proper working order. Place the fine adjust¬ 
ment at about the middle point of its range of action. 
3. Place the microscope stand squarely upon the table with 
the pillar directly in front of you, taking care that the direct 
sunlight does not fall upon you or upon any part of the instrument. 
Adjust the height of your own seat so that you can look through 
the tube with ease. 
4. If the ocular and objectives are not already in place, adjust 
them as follows: Place an ocular in the upper end of the tube, and 
with the coarse adjustment sufficiently raised to prevent contact 
of the objectives with the stage, screw each firmly into its proper 
place in the nosepiece, finally bringing the low power objective 
into line at the lower end of the tube. 
5. Look through the tube (using one eye while the other is 
kept open), and turn the mirror in such a way that the best 
available white light is reflected through the aperture of the stage 
giving a white circular field of vision. Note that the light may 
be taken from any direction except from behind you, while the 
microscope remains squarely placed in front of you. 
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