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14
the waste cup. Using the eyedropper, touch the
slide just above the specimen area and slowly let
the water drain into the cup.
With a paper towel, pat the underside of slide
dry. Be very careful and try not to touch the
specimen. Allow the specimen to air dry for sev-
eral minutes.
Some of the specimen will be flushed away, but
enough will remain on the slide to make good
observations. To save your slides, follow the pro-
cedure described previously.
The Micro-Slicer
Insert specimens you wish to study into the holes
of the micro-slicer (O, Fig. 1). Rotate the knob to
cut your specimen into thin slices. The Micro-
slicer is an ideal tool in the making of section
slides.
A Simple Section Slide
Section slides are extremely thin slices of tissues
of skin, leaves, flower stems, and other materi-
als. Generally, section slides are very difficult to
make without special equipment and proce-
dures. However, there is one common house-
hold item which can be sectioned without special
equipment: the common onion, made up of lay-
ers of tissue.
Peel off the very thinnest layer you can. One that
is nearly transparent will make an ideal section.
Slice into a piece about 1/4 x 1/4 inch.
Put two drops of eosin (
F, Fig. 1) in a bottle cap.
Pick up the piece of onion with your tweezers (A,
Fig. 1) and place it in the bottle cap.
Wait for a minute or two. Using the tweezers,
remove the piece from the stain. Hold it over the
waste cup and flush it with clean water from your
eyedropper. Place it on a clean slide. To save
your slide, follow the procedure described previ-
ously.
Life Under Glass
Fill a wide mouth jar with fresh water. Let it stand
for three or four days without the lid. Then drop
CAUTION: The
blade of the micro-
slicer is very
sharp. Handle the
micro-slicer with
care.