. Public health laboratory work, including methods employed in bacteriological research, with special reference to the examination of air, water and food contributed . Fig. 75.—Wheat. Tissue from the testa ot the grain, showingthe appearance of the cells forming its outer and inner membranes.(X 100) tufts from the external coat at one extremity of thegrain; these hairs are simply prolongations of thecells. The internal coat is made up of irregularly roundedopaque-looking cells, which frequently contain one ormore oil globules. The starch granules, comprisingalmost the whole of the interior of
. Public health laboratory work, including methods employed in bacteriological research, with special reference to the examination of air, water and food contributed . Fig. 75.—Wheat. Tissue from the testa ot the grain, showingthe appearance of the cells forming its outer and inner membranes.(X 100) tufts from the external coat at one extremity of thegrain; these hairs are simply prolongations of thecells. The internal coat is made up of irregularly roundedopaque-looking cells, which frequently contain one ormore oil globules. The starch granules, comprisingalmost the whole of the interior of the grain, are in-cluded within a thick-walled cellular network. In barley the envelopes are similar to those in wheat,except in the following respects :—The cells forming theexternal coat are smaller and more uniform in size 33^ LABORATORY WORK. than in wheat, and their outUne is serrated instead ofbeaded ; they carry, moreover, short thick hairs. Thecells of the middle coat are more elongated, and notbeaded—or very imperfectly so. Those of the innercoat are somewhat
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphiladelphiablakis
