Page:Foods and their adulteration; origin, manufacture, and composition of food products; description of common adulterations, food standards, and national food laws and regulations (IA foodstheiradulte02wile).pdf/325

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Fig. 39.Potato Starch (× 200).—(Courtesy Bureau of Chemistry.)

Fig. 40.Potato Starch under Polarized Light (× 200).—(Courtesy Bureau of Chemistry.)