EELATEVE SIZE OF THE Gr.INDEES. 71 



mediately below the temporary teeth, and divide their 

 two roots into four, the absorbing process continuing 

 until the bodies are reduced to simple plates and fall 

 off." 



In measuring the teeth in a large-sized head the 

 following facts and figures were elicited : Length of 

 grinder rows, 7 inches. Space between the sixth 

 grinders, upper rows, measuring from the inner sur- 

 faces, but not inchiding the angles, 3 inches ; center of 

 rows, 2ff ; first gi'inders, not including the space of 

 the angles, 2^. Lower rows: Between the sixth 

 gi-inders, 2|; center of row^s, lf|; first grinders, IJ. 

 Upper tush from first grinder, 2-J ; from third incisor, 

 1|. Lower tush from grinder, 3-|; from incisor, |. 

 Space between the upper tushes, 2 ; between the lower. 

 If. Space betw^een the upper corner incisors, measur- 

 ing from center of teeth, 2; lower, l^f ; between the 

 upper diWders, H; lower. If. Distance around semi- 

 circle of upper incisors, 4y\ ; around lower, 3^. 



As a supplement to the above, the following extract 

 is made from "' An Essay on the Teeth " by Surgeon 

 John Hughes ("Veterinarian/' 1841, "Proceedings 

 Vet. Med. Ass.," p. 22): 



" The iipper and lower grinders will measure from 

 2-|- to 3 inches in length. In transverse diameter the 

 former exceed the latter in the proportion of ? to 4. 

 The aggregate measurement of the sockets of the up- 

 per grinders is about 7 inches. The first tooth occu- 

 pies one inch and a half of this space, the second 1|-, 

 the third 1^, the fourth 1, the fifth 1, and the sixth 1^. 

 The breadtii of the con-esponding lower teeth is about 

 the same as that of the upper." 



