BLOOD-FORMING GLANDS 



173 



spleen may take on the haemopoietic function, the new cells being 

 formed in the sinuses of the organ." 



Technic. While the use of smear preparations (made as were the 

 blood films in the last exercise) is valuable to separate and study the 

 individual cells, it should be borne 

 in mind that to get any real rela- 

 tions of the various kinds of cells to 

 one another it is necessary to use 

 the best sections. As this study of 

 the structural relations is the only 

 way in which we can understand 

 the production of the blood, the 

 section method should be used 

 almost alone. The smear prepa- 

 rations may be used for com- 

 parison. 



w. bl.e. 



LITERATURE 



FIG. 154. Several cells sketched in situ in a 

 section of marrow from the Guinea pig's 

 humerus. g.c., giant cell ; my., myelocytes ; 

 e.b., erythroblast ; w.bl.c., white blood cell ; 

 r.bl.c., red blood cells ; mi., mitosis ; e-c., 

 erythrocyte. X 1000. 



SCHNEIDER, K. A. "Histologie," S. 474, 



"Blutdriise der Astacus." 

 SAXER, FR. " Uber das Entwicklung und 



den Bau der normalen Lymphdrusen 



und die Entstehung der roten und weissen Blutkorperchen," Anal. Hefte, No. 6, 



1896. 

 WHITE, F. G. "Haemolymph Glands in Domestic Animals," Am.Journ. ofAnat., Vol. 



Ill, p. 8. 

 MALL, F. P. "The Lobule of the Spleen," Johns Hopkins Hospital Bulletin, Vol. IX, 



1898. 

 BUNTING, C. H. " Formation of Blood by the Spleen," Journ. Exp. Medicine, Vol. 



VIII, No. 5, 1906. 



