( "5 ) 
other half has 5 of thofe Eminences, where it Grinds, (whereof 
formerly, when ipeaking of the Upper Jaw,) and 4 on the Lefc, 
Each of the fore Teeth is 6 Inches long, and has 6 or 7 of the 
fore-mention "'d Eminences, and as many Depreflions. The hind 
Teeth of Dr. Moulin s Elephant feem to have been of an equal 
length on both files, and much longer than the fore Teeth. 'Tfs 
obfervable, that the Ridges at the fides are correfpondent to the 
Eminences where they Grind, and the Sulci to the Deprelfions. 
The Teeth of the Lower Jaw exceed thofe of the Upper about z 
Inches in length ; by which it appears, that the motion of the 
Lower Jaw mult be very great in Maftication, and that the E'e- n'L e j eit > } 
phant for the moll part moveth the Jaw from behind to before or Q r ^^r 
and fca cely from one fide to the other, as in Animals that ru - 0 f the Lorn 
minate, or chew the Cud. Thefe T eeth are the moft firm, folid,y*w 
and weighty Bones of any Aninal yet known, and are as good I. 
vory as the Tusks themfelves. Before we quit the Lower Jaw, I 
hope it will not be impertinent to enquire, whether or no thefe 
Rudimtnta Dentium may be fuppos’d in procef of Time to defcend 
and expell thofe Teeth already form’d, and fucceed in their place $ 
and if not, what may befheir Ufe. For the iirft queltion, ’tis 
true, Children have two ranges of Teeth, tho’ not equally folid, 
the fecond whereof expels the firlt at or about 7 Years of Age, 
and fucceeds them, the firft being only fo many Sheaths or Covers, 
whereby the fecond, being yet but a foft Mucilaginous Subftance, 
are defended from External Injuries, till in procefs of time they 
have attain’d to a convenient hardneis ; and that there is a great 
difference in the Teeth of fome Quadrupeds, fuch as young Horfes, 
whofe Foie or Colt Teeth, as they are call’d, have fome Marks, 
which are obliterated after a certain period of \ ears (well enough 
known to Jockies *) fothat it would appear, if thefe Teeth are 
not expell d, yet their Surface by degrees is abraded, and inftead 
of that their Roots are augmented, and the Teeth receive fuch 
an alteration, as their Age is no more known by thefe Marks. 
I have already obferv’d, that there are feveral Ridges and Fur 
rows in the Teeth of this Animal, which feem to be an Evidence, 
that thefe Rudimenta have grown together and become one Tooth j. 
but whether the %udimcnta y which have not as yet appeared 
without the Jaw, do ever expel thefe which have appeared, and 
fucceed them, is the queftion • no Experiment yet being made 
concerning the Production of thofe in this Animal. The period 
’ ot the Time that Elephants live, and the Age of this we treat of 
being unknown, we can give no poficive determination in this Mac- 
