LECTURE XII. 361 



Tke upper layer was 4 — 6 inches thick, and about four feet 

 below the present surface ; in it were found angular pieces 

 of Roman tiles, and an obliterated Roman bronze coin. 



The second layer was six inches thick, and lay at a depth 

 of ten feet ; it contained some fragments of unvarnished clay 

 mixed with sand and a tweezer made of bronze. 



The lowest layer was about 6 — 7 inches thick, at a depth 

 of nineteen feet. In it were rude pottery, pieces of charcoal, 

 broken animal bones, a collection which indicates the stone 

 period, though certainly the end of it, as Riitimeyer, after an 

 examination of the bones, believes that they belong to a later 

 period than the stone epoch. " Besides numerous remains of 

 man," says Riitimeyer, " there were some of the domesticated 

 dog, pig, sheep, and cow, perfectly resembling the present 

 species, but differing widely from those of the stone period. 

 It was not merely the recent aspect of these bones, but the 

 great difference between these races of dogs and swine and 

 those of the pile-works, which testifies that these bones are 

 later additions to the relics of primitive human industry." No 

 stone or horn implements were found, which might have 

 thrown some light on this point. 



Morlot's calculation is founded on the regularity of the 

 structure of the above cone, and the uniformity of its growth. 

 The Romans, he observes, came into the country fifty-eight 

 years before Christ, after the battle of Bibracte. In the year 

 563, after Christ, Tauredunum was destroyed by the fall of a 

 mountain, and already, a century before, the Burgundians, 

 who did not burn their bricks, had put an end to Roman do- 

 minion. The Roman layer is, therefore, at the utmost eighteen 

 centuries, and at least thirteen centuries old. Assuming now 

 that the torrent had since that time deposited about four feet 

 (1,14 meter), and that this accumulation proceeded from the 

 remotest time at a uniform rate, we obtain for the bronze- 

 bed an antiquity of at least twenty-nine, and at most of forty- 

 two centuries ; for the stone period, a period of at least tortj- 

 seven, and at most seventy centuries ; and for the whole cone, 

 about one hundred centuries. 



I must here observe, that in the layer of the stone period 



