Note 14 — II. ON THE PLACES OF ORIGIN OF THE WHITE BLOOD CORPUSCLES.

C. S. Engel has recently proposed to call acute leucocytosis "lienal leucocytosis," in analogy with the clinical idea of a lienal leukæmia. This terminology should only be used if the polynuclear cells did in fact arise from the spleen, an assumption which Engel himself does not once appear to make, since he expressly warns against drawing any conclusions from this name as to their origin. Since, however, the acute leucocytoses, as we shall shew in the next section, are exclusively to be referred to the bone-marrow, the term lienal leucocytosis seems to us quite mistaken, for it must logically lead to a conception of the origin of the leucocytes, exactly opposed to their actual relationships.