Red tide and clams

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Description: Testing clams for effects of red tide. Samples in plastic bag collected from Gloucester. Shells pried open with knife, innards scraped out, rinsed in sieve, pureed in blender, poured into beaker, weighed on balance scale, diluted with acid, placed on burner, transferred to vial, placed in centrifuge. Chart and map of shellfish sampling areas on North Shore for red tide measurement.