50 PRACTICAL MICROSCOPY. 



slide; add a drop of normal salt solution (vide formulae); mix with 

 a needle, and put on the cover-glass. 



With H. observe, among the numerous blood-corpuscles, fat 

 globules, etc., the polyhedral liver cells, about twice or three times the 



FIG. 34. GLANDULAR EPITHELIA. 



A, A. Polyhedral cells from human liver. 



B. Double nuclei. 



O. Cells from same showing connection with a capillary. 



D. Same cells infiltrated with globules of fat. 



E. Cells from liver of pig showing intracellular net- work, x 400 , 



diameter of a white blood-corpuscle (Fig. 34). Notice the large 

 spherical nuclei, with nucleoli. Note, also, the yellow pigment granules 

 and the fat globules in the body of the cells. Masses of these cells 

 resemble somewhat pavement epithelium; they are not flat but poly- 

 hedral. 



STELLATE CELLS. 



When we arrive at the study of the skin, I shall show you some 

 very beautiful examples of stellate cells. I prefer to leave their 

 demonstration until you have become more familiar with tissue cut- 

 ting. 



POLAR CELLS. 



. As I have stated, spheroids may send off processes. These pro- 

 longations may be one, two, three, or more in number, constituting 

 unipolar, bipolar, tripolar, etc., cells. The best demonstration is 

 made from the nervous system, where these poles are continued as 

 nerves, etc. 



