. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . but about the raphe it is several timesthicker. 3. Colorless Cells (w). The next layer consists of small (10-30 n),colorless cells, with sharply defined walls 2-3 /< thick. Cells divided bytangential partitions occur not infrequently. Hanausek states that thesecells contain occasional oxalate cr)stals or granular masses; most ofthem, however, are emj)ty. 4. Palisade Cells (pal). Over one-lialf of tlic thickness of thespermoderm is due to the thickened palisade cells.
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . but about the raphe it is several timesthicker. 3. Colorless Cells (w). The next layer consists of small (10-30 n),colorless cells, with sharply defined walls 2-3 /< thick. Cells divided bytangential partitions occur not infrequently. Hanausek states that thesecells contain occasional oxalate cr)stals or granular masses; most ofthem, however, are emj)ty. 4. Palisade Cells (pal). Over one-lialf of tlic thickness of thespermoderm is due to the thickened palisade cells. These remark-able and exceedingly characteristic cells are 8-20 it wide, and about150 /I long, each consisting of an outer portion of about one-third thelength of the cell with nearly colorless walls, and an inner portion COTTON SEED. 209 with yellowish-brown walls. The lumen in the outer portion of eachcell is narrow except for a globular enlargement at the inner end, 4-6 fiin diameter, containing a dark-colored material. Seen in tangential sec-tion, this cavity has radiating branches. An indistinct light line adjoins. aep— Fig. 166. Cotton Seed. Cross section. 5 spcrmoderm consists of ep epidermis withh hair, hr outer brown coat with R raphe, -w colorless cells, pal palisade colls, anda b and c layers of inner brown coat; A perisperni; E endosperm; C cotyledon withaep outer epidermis and iep inner epidermis; s resin cavity surrounded by s mucilagecells; a/aleurone grains; ^ crystal cells; ^ procambium bundles. Xi6o. (Winton.) the outer wall. No lumen at all appears in the inner portion of thesecells in cross section, but in tangential section faint radiating lines areevident, due, according to von Bretfcld, to lame/lcB arranged about theaxis of the cell. Individual cells isolated by macerating with Schulzessolution and treated with chromic acid show clearly this differentiation. 210 OIL SEEDS. The same author found that the outer portion has all the chemical andoptical prop
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Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
