46 



THE CIRCULATION OF THE BONE-MARROW. 



Mollier, S., 1909. Ucber den Bau der Milz. Sitzngsb. d. 



Gesellsch. f Morphol. u. Phsyiol. in Miinchen. 

 1911. Die Blutbildung in der embryonalen 



Leber de.s Menschen und der Saugetiere. Arch. 



f. mikr. Anat., vol. 74, pp. 474-524. 

 Pappenheim, Arthur, 1919. Morphologische Hiimatologie. 



Band 1. Included in vol. 23 of Folia hjematol. 

 Rich, A. R., 1921. Condition of the capillaries in histamine 



shock. Jour. Exper. Med., vol. 33, pp. 287-298. 

 Richards, A. N., 1922. Kidney function. Amer. Jour. 



Med. Sci., vol. 163, pp. 1-19. 

 Rindfi^eisch, G. E., 1880. Ueber Knoekenmark und Blut- 



bildung. Arch. f. mikr. Anat., vol. 17, pp. 



1-11; also pp. 21-42. 

 Sabin, F. R., 1920. Studies on the origin of blood-vessels 



and of red blood-corpuscles as seen in the living 



blastoderm of chicks during the second day of 



incubation. Contributions to Embryology, vol. 



9, pp. 213-262, A Memorial to Franklin Paine 



Mall, Carnegie Inst. Wash. Pub. 272. 

 1921. Studies on blood. The vitally stainable 



granules as a specific criteria for erythro blasts and 



the differentiation of the th; ce strains of the white 



blood-cells as seen in the living chick's yolk sac. 



Johns Hopkins Hosp. Bull., vol. 32, pp. 314-321. 

 Schafer, E. A., 1912. Quain's Anatomy. Vol. 2, pt. l,p. 154. 

 Schridde, H., 1907. Die Entstehung der ersten embry- 



onalen Blutzellen des Menschen. Verhandl. d. 



deutsch. path. Gesellsch., Dresden, 1907; Jena, 



1908, vol. 12, pp. 360-366. 

 St'Alteholz, W., 1914. Ueber das Durchsiehtigmachen von 



menschlichen und tierischen Praparaten. 2nd 



edition. S. Hirzel, Leipzig. 

 Van der Stricht, O., 1892. Nouvelles recherches sur la 



genese des globules rouges et des globules blancs 



du sang. Arch..de Biol., vol. 12, p. 199-344. 

 Venzlaff, W., 1911. tjber Genesis und Morphologie der 



roten Blutkorperchen der Vogel. Arch. f. mikr. 

 Anat., vol. 77, pp. 377-431. 

 Weidenreich, F., 1903-1904. Die rotem Blutkorperchen. 



Ergebn. der Anat. u. Entwicklungsgeseh., vols. 



13 u. 14. 

 Wisuxki, G. B., 1921. Experimental observations on bone- 

 marrow. Johns Hopkins Hosp. Bull., vol. 32, 



pp. 132 134. 



DESCRIPTION OF PLATE. 



Fia. 4. Distal half of radius, pigeon 16 A:, injected with india-ink (dilution 1-4). Marrow cleared in situ by the 

 Spalteholz method. Injection very incomplete. The nutrient artery and efferent vein are seen occupy- 

 ing the nutrient foramen. The longitudinal distribution of the main vessels is seen. Near the epiphysis 

 one small artery enters the marrow cavity while several small veins emerge. There is extensive anas- 

 tomosis between the medullary vessels and these extra-diaphaseal vessels. There is an indication of 

 the venous-tuft distribution seen more distinctly in the other figures. X 10. 



Fig. 5. Radius from pigeon 35 A, the marrow having been embedded and sectioned serially, 150 m- The central 

 longitudinal vein is shown with two main venous tufts anastomosing. A branch of the longitudinal 

 artery connects with the venous tufts by way of the "transition-capillary" link. These vessels function 

 normally and, though few in number, appear to be the regular avenues for the passage of blood from the 

 arterial to the venous side. X 1 10. 



Fio. 6. Portion of radius of pigeon 36 A, cleared with marrow in situ, showing a more extensive injection than figure 4. 

 The venous and arterial tufts suggest a segmental distribution. The nutrient vessels of the bony 

 cortex are seen extending into and anastomosing with the medullary vessels. X26. 



