1) Place a drop of blue dye on a glass slide.
2) Cut out a small section of tissue(onion or other) using a scalpel
or pick off individual structures with a dissecting needle. Do not cut out too large a section because you will not be able
to view it clearly on the compound microscope.
3) Place the cut out section in the water droplet.
4) Gently place a cover slip over the water droplet. Place one side of
the cover slip against the water droplet and gently let the cover slip fall over the droplet.
5) Gently tap the cover slip with the blunt end of the dissecting needle
or scalpel to remove air bubbles if present.