. Elements of applied microscopy. A text-book for beginners. Microscopy. FOODS AND DRUGS AND THEIR ADULTERANTS. 77 gated into masses, while their size is very small, averaging about .003 mm. Besides these starch masses at least two characteristics kinds of cells from the hull may appear in black pepper. The outermost layer furnishes dark-brown fragments made up of the stone-cells so called, polygonal, thick-walled cells with a small dark lumen and striations radiating out from it (a. Fig. 31).. Fig. 31.—^Microscopic Structure of Pepper. (After Schimper.) 240 diameters. The cells of the inner p
. Elements of applied microscopy. A text-book for beginners. Microscopy. FOODS AND DRUGS AND THEIR ADULTERANTS. 77 gated into masses, while their size is very small, averaging about .003 mm. Besides these starch masses at least two characteristics kinds of cells from the hull may appear in black pepper. The outermost layer furnishes dark-brown fragments made up of the stone-cells so called, polygonal, thick-walled cells with a small dark lumen and striations radiating out from it (a. Fig. 31).. Fig. 31.—^Microscopic Structure of Pepper. (After Schimper.) 240 diameters. The cells of the inner part of the hull occur in lighter, yellowish-brown masses, and have a somewhat similar structure except that their lumen is much larger and their waUs thinner (6, Fig. 31.) Smaller fragments of parenchyma tissue may be seen, with irregular, thin- waUed cells and occasional large spaces where deposits of oil were present in the fruit (c, Fig. 31). White pepper made up simply of the central part of the seed contains practically nothing but the irregular, silvery masses of pepper-starch with occasional small fragments of the outer Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Winslow, C. -E. A. (Charles-Edward Amory), 1877-1957. New York, J. Wiley; London, Chapman & Hall
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