Diagnostic methods, chemical, bacteriological and microscopical : a text-book for students and practitioners . year. It must be remembered that a leucocytecount may be low and yet a lymphocytosis exist. This is shown in typhoidfever, amebic dysentery, chlorosis, pernicious anemia, scurvy, and otherconditions in which the leucocyte count is low, the granular cells being dimin-ished in number, but the lymphocytes being increased. In the congenital andalso secondary acquired syphilis we find a lymphocytosis which must be re-ferred to involvement of the lymph-glands. The worker must not be led int
Diagnostic methods, chemical, bacteriological and microscopical : a text-book for students and practitioners . year. It must be remembered that a leucocytecount may be low and yet a lymphocytosis exist. This is shown in typhoidfever, amebic dysentery, chlorosis, pernicious anemia, scurvy, and otherconditions in which the leucocyte count is low, the granular cells being dimin-ished in number, but the lymphocytes being increased. In the congenital andalso secondary acquired syphilis we find a lymphocytosis which must be re-ferred to involvement of the lymph-glands. The worker must not be led intoa mistaken interpretation of his blood-findings, as enlarged lymph-glandsmay give the same picture of lymphocytosis as is seen in Hodgkins disease,chronic and acute lymphatic leukemia. Eosinophilia. By this is meant an absolute increase in the number of eosinophilic average number of these cells is between one and two hundred per cmm.,hence the term eosinophilia should be limited to those cases showing countssomething above 250. We find a physiological eosinophilia during childhood, PLATE EosiNOPHiLiA. (Wrights Stain.) THE BLOOD. 493 the average increase being about i to 2 per cent, above the normal adult find-ing. No physiological relations have been established between eosinophiliaand sex, pregnancy, menstruation, digestion, or old age; however racial distinc-tions are sometimes shown by eosinophilia, the natives of southern Chinashowing between 15 and 20 per cent, of the leucocytes as eosinophiles. Pathological Eosinophilia. We observe variations in the number of eosinophiles in various affectionsof the bone-marrow. Thus in splenomyelogenous leukemia, we may findthese cells increased as high as 30,000 per cmm. According to Ehrlich, adiagnosis of this form of leukemia is warranted only when we have an increasein the number of eosinophiles, but it cannot be doubted that cases are relativelyfrequent in which these cells are not increased. In sarcoma of the bon
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