. The diseases of infancy and childhood. es that staindeeply with acid dyes, and often a narrow outer layer stains moredeeply than the rest. They form from one to two per cent of the totalnumber of white cells. 5. Mast Cells.—They are only occasionally found, their proportionbeing about per cent of the white cells; they are polymorphonuclearcells whose granules stain only with basic dyes, not at all with tri-acid;often they are metachromatic (Plate XII, C, 12). Pathological White Cells.—Of these there are three principal forms: 1. Myelocytes, neutrophilic.—They have neutrophilic granules a
. The diseases of infancy and childhood. es that staindeeply with acid dyes, and often a narrow outer layer stains moredeeply than the rest. They form from one to two per cent of the totalnumber of white cells. 5. Mast Cells.—They are only occasionally found, their proportionbeing about per cent of the white cells; they are polymorphonuclearcells whose granules stain only with basic dyes, not at all with tri-acid;often they are metachromatic (Plate XII, C, 12). Pathological White Cells.—Of these there are three principal forms: 1. Myelocytes, neutrophilic.—They have neutrophilic granules and asingle rounded nucleus (Plate XII, C, 11). Ehrlichs myelocytes differfrom those of Cornil in that the cells as a whole are smaller, the nuclei aremore centrally situated and stain more deeply. 2. Myelocytes, eosinophilic.—These resemble the polynuclear eosino-philes, except for the round, undivided nucleus. 3. Myelocytes, basophilic.—These are similar to the mast cells, dif-fering only in the form of the nucleus. PLATE XII. B.
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