THE HUMAN SPLEEN AS AN HAEMATOPLASTIC ORGAN, AS EXEMPLIFIED IN A CASE OF SPLENOMEGALY WITH SCLEROSIS OF THE BONE-MARROW.

1. The nodules found in the spleen are islands of active haematoplastic tissue. 2. The bone-marrow, at least in the case which has been described, has been the primary focus of disease; some toxin has probably produced a chronic inflammatory change. 3. The bone-marrow, owing to its enormous sclerosis, has lost its haemopoëtic powers totally or to a marked degree and the spleen has reverted to its foetal power to form blood.