. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . groovein the caryopsis, and is partially hidden from view b\ the overlaj)pingglume. Both before and after the removal of the chalT, the grain isdistinctly s])in(lle sha])e(l. The groove on the ventral side of the cary-opsis and the depression ovir the embryo at the base of the dorsal sideare the same as in wheat and rve. BARLEY. 8z HISTOLOGY. Cross-sections are prepared without removal of the glume and treatments of the section with potash, dilute acetic
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . groovein the caryopsis, and is partially hidden from view b\ the overlaj)pingglume. Both before and after the removal of the chalT, the grain isdistinctly s])in(lle sha])e(l. The groove on the ventral side of the cary-opsis and the depression ovir the embryo at the base of the dorsal sideare the same as in wheat and rve. BARLEY. 8z HISTOLOGY. Cross-sections are prepared without removal of the glume and treatments of the section with potash, dilute acetic acid, andchlorzinc iodine solution, or Javelle water and safranin, aids greatly indifferentiating the layers. The glume and palet are readily separatedafter boiling with water. The layers of these, as well as of the caryopsis,are obtained for study by scraping, and may be cleared and stained inthe same manner as the cross sections. The kernels of naked barleys are distinguished from the other varie-ties not only by the absence of chaff but also by their larger size and thethicker walls of the epicarp and middle Fig. 44. Bdr\ey{Hordeitm sativum). Crosssection of palet and outer layers of palet; FS pericarp and spermoderm;endosperm consists of al aleurone cells,and E starch cells. X 160. (ISIoeller.) Fig. 45. Barley. Palet in surface epidermis consists of elongated wavycells, h circular cells extended into shorthairs, and 5 twin cells; / hypoderm fibers. X300. (MOELLER.) The Flowering Glume and Palet (Figs. 44, P) are each made upof four layers. I. The Epidermal Cells (Fig. 45) are strongly silicified and are ofthree forms. First, elongated cells with wavy side walls; second, smallcircular cells extended beyond the surface in the form of conical hairs{h)\ and third, crescent-shaped, hemi-elhptical or circular cells occur- 82 GR/tlN. ring usually in pairs {s). Examined in water, the Ihickencd, convoluteddouble walls of the long cells appear to be of uni
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Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
