EMHPFFIG 2: HPF sample carriers.

A. Worms in mounting medium are placed into the shallow well in a Type A specimen carrier (below). The flat side of the Type B hat is used as the top. The two hats are squeezed together and loaded into the HPF sample loading system. No voids are desired inside the well, and no excess material is desired above the rim of the well.
B. A more shallow well can be created by placing one or two slot grids between the flat sides of two Type B hats. Worms and mounting medium fill only the narrow slot, and should freeze faster.

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