120 ON THE HISTOLOGY OF THE HARD DENTAL TISSUES. 



their outline than are those of the original cementum. Absorption 

 may also at the same time take place, and a fresh arrangement of 

 the osseous elements be produced ; thus it is not an infrequent occur- 

 rence to meet with specimens in which large portions of the cemen- 

 tum has been hollowed out, and in its place nodular, almost struc- 

 tureless, masses of ossific matter deposited. These change.* are 

 chieflj met with in teeth that have been the subject of the most 

 intense inflammation — several specimens of which I shall bope to 

 have the pleasure of submitting to your examination this evening. 



Having now occupied your time longer than the usual limits of 

 a short paper, and in which I have treated of my subject in, I fear, 

 a very meagre manner, I must apologise for not having been more 

 exhaustive, but the subject is one that would demand a considerably 

 longer time to treat as it deserves than can be given in one paper. 

 The aim I have had in view has been rather to afford some clue to 

 the various tissues presented to our notice in looking at an ordinary 

 section of a tooth, than to write a laborious paper, which, however 

 in place in a professional theatre, would be foreign to the require- 

 ments of the general observer. 



