CLARK: CYTOLOGY OF CARCINOMA. 219 



No. of cells. Direct divisions. Indirect divisions. 



106 00 4 



Percentage of cells in divisions 3.77 



" of cells in direct divisions 



" of cells in indirect divisions 3.77 



" of divisions which are direct 



" of divisions which are indirect 100 



* 



Cell Nest 6. This was a cross section of a large alveolus, 

 being .2875 mm. in length and .1758 mm. in width. It was 

 regularly oval in outline. There were two degenerate spots 

 in it at opposite sides, the size of six to eight cells. With these 

 exceptions the cells were all counted. 



Tier 123456789 10 11 Av. Total 



Direct D 14 1.3.21.. . . 5.0 12 



Indirect D 1 1 .... 2 5.2 4 



No. of cells. Direct divisions. Indirect divisions. 



676 12 4 



Percentage of cells in divisions 2.36 



" of cells in direct divisions 1.70 



" of cells in indirect divisions 0.60 



" of divisions which are direct 75 



" of divisions which are indirect 25 



Cell Nest 7. This was a small, oval, non-necrotic nest. 



Tier 123^56789 10 11 Av. Total 



Direct D 00 00 



Indirect D 14 1.8 5 



No. of cells. Direct divisions. Indirect divisions. 



123 00 5 



Percentage of cells in divisions 4.06 



" of cells in direct divisions 



" of cells in indirect divisions 4.06 



" of divisions which are direct • 



" of divisions which are indirect 100 



Cell Nest 9. This was a large necrotic nest, .2125 mm. in 

 diameter, with a necrotic center .1125 mm. in diameter, which 

 had a border of vigorous cells .05 mm. wide. 



Tier 123^56789 10 11 Av. Total 



Direct D 1 . 4 . 1 1 . . . 1 . . 4.2 8 



Indirect D 1.1 2.0 2 



No. of cells. Direct divisions. Indirect divisions. 



299 8 2 



Percentage of cells in divisions 3.34 



" of cells in direct divisions 2.60 



" of cells in indirect divisions 0.70 



" of divisions which are direct 80 



" of divisions which are indirect 20 



