560 APPENDAGE TO THE VOLCANIC. 



heat which is felt through the boots, becomes in- 

 supportable. 



" One is then obliged every moment to move 

 forward or return against one's will, from the 

 way one would wish to go. If the naturalist 

 would observe these objects near and in their 

 place, he is not always at liberty to satisfy him- 

 self, the suffocating smoke sometimes preventing 

 him from stooping as much as would be neces- 

 sary. The day I was at Fontaynes, the wind 

 was favourable, as I have said ; it prevented the 

 smoke from rising, and, at the same time, drove 

 it in a certain direction. But it often happens 

 that the heat of the fire will not allow the tra- 

 veller with impunity to pick up calcined stones, 

 N or other substances, which he may think worth 

 examination. 



" This burning heat of the hill of Fontaynes, 

 seems to gain towards the east and south ; on the 

 opposite side where the fire recedes, grass grows 5 

 and corn and rye are sown within four or five 

 fathoms of the conflagration." 



