CHAPTER XII. 



TARTAR. 



HOW FORMED ITS EFFECT ON THE TEETH LAMPAS 

 CAUSE, SYMPTOMS AND TREATMENT. 



Tartar is composed of earthy salts and animal 

 matter. Phosphate and carbonate of lime and 

 fibrin or cartilage are its principal Ingredients; a 

 small quantity of fat also enters into its composition. 

 The relative proportions vary in different animals 

 and also in the same animal. 



All teeth are subject to tartar but not alike, it 

 being deposited to a very great extent on some, 

 while on others it exists only in small quantities. 

 It collects on the teeth of some animals in greater 

 abundance than on those of others, and its chemical 

 composition and physical characteristics are exceed- 

 ingly variable. In some horses it is very hard and 

 is then almost wholly composed of earthy ingredi- 

 ents; in others it is soft and easily crushed between 

 the fingers. In such cases it contains a greater per 

 cent, of animal matter. 



Its color varies in different animals; in some it is 

 a dark brown or nearly black; in others pale yellow- 

 ish brown, and in some instances nearly white. 



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