The red marrow of bones, especially of the ribs, has been utilized in medical practice. The marrow itself, finely subdivided and seasoned suitably, has been eaten spread on buttered bread. For the most part the glycerin extract is used, and is so prepared as to be given in the dose of a teaspoonful three times a day.

As the red globules of the blood are to a great extent developed from the large cells of the red marrow, it follows that the administration of this material should increase them when deficient. It is especially in anaemia characterized by deficiency in the red blood-globules that the use of bone marrow is indicated, and the clinical experience coincides with theory, for a remarkable improvement takes place in cases of this kind. The results of its administration are these: the red globules and the haemoglobin are increased, and the white cells are lessened. These good effects are accompanied by a general improvement in body weight and an increase of vital activity in all directions.