. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . It is this mucilaginous sub-stance that gives the seed itsvalue in medicine. In surfaceview (Fig. 164, ep^), the cells aref)olygonal, with a finely granular cuticle. The layer is brittle and readilybreaks up into pieces through straight or irregular cracks. 2. Round Cells (Fig. 163, p; Fig. 164, r). One or two layers ofyellow cells with circular cavities and marked intercellular spaces formthe second layer. Their appearance in surface view is characteristic. 3. Fiber Lay
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . It is this mucilaginous sub-stance that gives the seed itsvalue in medicine. In surfaceview (Fig. 164, ep^), the cells aref)olygonal, with a finely granular cuticle. The layer is brittle and readilybreaks up into pieces through straight or irregular cracks. 2. Round Cells (Fig. 163, p; Fig. 164, r). One or two layers ofyellow cells with circular cavities and marked intercellular spaces formthe second layer. Their appearance in surface view is characteristic. 3. Fiber Layer (/). Strongly thickened, porous libers longitudinallyarranged make up this layer. They vary up to 250// in length and 10,«in breadth. As may be seen in cross section, their radial diametersare much greater than their breadth. 4. Cross Cells (tr). Several layers of exceedingly thin walleil, moreor less obliterated, colorless cells cross the libers of tlu- j)receding layerat right angles. Layers i to 4 inclusive usually separati- from the seed together, {)re-senting in surface view a highly characteristic Fig. 162. Flax Fruit. Dissepiment in surfaceview. X160. (K. B. WiNTON.) LINSEED. 205 5. Pigment Layer (Fig. 163, g; Fig, 164, pig). Equally characteris-tic are the square or polygonal cells of this layer, with finely porous wallsand deep yellow or brown contents. This material is insoluble in alcoholor ether and is colored dark blue by ferric chloride. It often separatesfrom the cells in the form of rectangular plates.
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Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
