Set up the Hirsh funnel from the microkit as
shown in the illustration to the right. Be sure to
clamp the filter flask to a ring stand and to place a
piece of filter paper in the funnel. Connect a rubber
hose from the side-arm on the flask to the side-arm
(NOT THE BOTTOM) of the aspirator. Turn on the
aspirator. Pour the crystals and mother liquor from
the beaker into the Hirsh funnel. If some crystals
stick to the beaker, you can scrape them out with a
spatula or wash them out with the mother liquor in
the filter flask if you used a clean flask. Allow air to be drawn through the crystals for 10
minutes. Place the crystals in an unstoppered vial in your drawer.