Translation: In the so-called red bone marrow of man as well as the rabbit, one can regularly find, in addition to the well known marrow cell, certain other elements which have not been mentioned until now; namely nucleated red blood cells, in every respect corresponding to embryonic stages of the red blood cells. Also is the marrow rich in fat, the same cells are present but in lower quantity and their number decreases parallel to the decrease in the number of marrow cells and the increase in the number of fat cells (see above "Neumann-Law"). It is possible, to trace the origin of these elements in the blood of the marrow cells The high content of colorless elements in the blood of the marrow makes it likely that these is a migration of contractile marrow cells into the vessels. A thorough description of my observations will be published.
