. Elements of applied microscopy. A text-book for beginners. Microscopy. 72 ELEMENTS OF /tPPLIED MICROSCOPY. 3. The Microscopic Structure of Coffee.—^The coffee- bean is the seed of Coffea arabica, a small tropical tree of the family Rubiaceae, two of the semi-ellipsoidal beans lying base to base in each of its berries. The beans are brought into the market generally roasted, either in their original form or ground, and although adulteration ' is most easy in the second condition, artificially modelled beans of foreign material are not unknown. The true coffee-bean is made of thick-walled cell
. Elements of applied microscopy. A text-book for beginners. Microscopy. 72 ELEMENTS OF /tPPLIED MICROSCOPY. 3. The Microscopic Structure of Coffee.—^The coffee- bean is the seed of Coffea arabica, a small tropical tree of the family Rubiaceae, two of the semi-ellipsoidal beans lying base to base in each of its berries. The beans are brought into the market generally roasted, either in their original form or ground, and although adulteration ' is most easy in the second condition, artificially modelled beans of foreign material are not unknown. The true coffee-bean is made of thick-walled cells, approximately isodiametric, and packed with a finely. Fig. 29.—Microscopic STRtrcruRE of Coffee. 240 diameters. (After Schimper.) granular material containing minute oil-drops. The cells of the inner part are very characteristic, showing knotty thickenings of their walls, as indicated at B in 'Fig. 29. More peripheral cells (C) are smaller and lack these swellings, while at the extreme outside of the bean is the so-called silverskin, a thin glistening layer contain- ing peculiar fusiform cells with wide walls pierced by. 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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