146 NORMAL HISTOLOGY AND ORGANOGRAPHY. 



formula for one side being, I.f- C.| M.f = 10. The 

 second set, or permanent teeth, number thirty-two 



felf Pulp cavity. 



Fig. 104. Scheme of a longitudinal section through a human 

 tooth In the enamel are seen the "lines of Retzius" (Bohm and 

 JJavidoff). 



