Leukcemia of the Fowl. 33 



14. HIRSCHFELD, H., and JACOBY, M.: Uebertragungsversuche mit 



Huhnerleukamie. Ztschr. f. klin. Med., 1910, LXIX, 107- 

 120. 



15. BUECKHARDT, J. L. : (Bei der 82. Versammhmg Deutscher Natur- 



forscher und Aerzte zu Konigsberg.) Ztschr. f. Immunitats- 

 forsch. u. exper. Therap., 1910, Theil 2, 810-811. 



16. Ueber das Blutbild bei Hiihnertuberkulose und dessen 



Beziehungen zur sogenannten Huhnerleukamie, nebst Bemer- 

 kungen iiber das normale Hiihnerblut. Ztschr. f . Immunitats- 

 forsch. u. exper. Therap. 1912, XIV, 544-604. 



17. HIRSCHFELD, H., and JACOBY, M. : Uebertragbare Huhnerleukamie 



und ihre Unabhangigkeit von der Hiihnertuberculose. Ztschr. 

 f. klin. Med., 1912, LXXV, 501-505. 



18. ELLERMANN, V: Unders0geler over H0nseleukaemiens Virus. 



Urgesk. f. Laeger, 1913, LXXV, 1685-1691. 



19. Untersuchungen iiber das Virus der Hiihnerleukamie. 



Ztschr. f. klin. Med., 1914, LXXIX, 43-48. 



EXPLANATION OF FIGURES. 



FIG. 1. Normal blood of the fowl. Wilson's stain. Zeiss objective 1/12, 

 eye-piece No. 3. Composite picture, (a) Normocytes. (b) Blood plate- 

 lets, (c) Polymorphonuclear leucocyte with eosinophilic rods, (d) Poly- 

 morphonuclear leucocyte with eosinophilic granules, (e, e') Lymphocytes 

 (small and large). (/) Large mononuclear cell, (g) Mast cell. 



FIG. 2. Leukaemic blood of the fowl. Wilson's stain. Zeiss objective 

 1/12, eye-piece No. 3. Composite picture, (a) Normal normocytes. (6) 

 Normocytes showing anisocytosis, poikilocytosis, polychromatophilia, 

 with swelling of nucleus and separation of its chromatin. (c) Normoblast. 

 (d) Megaloblast. (e) Mitoses of erythrocytes ; all stages from monaster 

 to complete division of nucleus. (/) Blood platelets; both cell and nucleus 

 increased in size; increase in size with two nuclei, (g) Polymorphonu- 

 clear leucocyte with eosinophilic rods, (h) Polymorphonuclear leucocyte 

 with eosinophilic granules, (i) Lymphocyte. (;') Large mononuclear 

 cell; same size and larger than normal with both nucleus and cytoplasm 

 paler, (fc) Mitoses of large mononuclear cell; all stages, from monaster 

 to complete separation of nucleus. (I) Mast cell, (m) Mononuclear 

 myelocyte with eosinophilic' granules, (n) Cytoplasmatic masses without 

 nuclei. 



FIG. 3. Cervical lymph-glands of the fowl ; normal and leukaemic. Actual 

 size and X 2. Note the great increase in size; replacement of fat by the 

 greatly swollen parenchymatous lobules. 



FIG. 4. Normal fowl with organs in situ. Weight, 1750 gm. Note the 

 well-nourished condition of the body; the abundance of fat, subcutaneously, 



