1. The nodules found in the spleen are islands of active hæmatoplastic 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 hæmopoëtic powers totally or to a marked degree and the spleen has reverted to its fœtal power to form blood.

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