A YORKSHIRE NATURALIST 177 



tissues, as its companions. It had been converted 

 into a hollow vertical receptacle submerged by the 

 tide, which had in like manner emptied the other 

 stems of their contents. But it is evident that the 

 material and several branches and rootlets thus 

 floated out had not gone very far away. Some 

 fortunate current brought them back to the spot on 

 which our one tree stood and poured them into its 

 hollow cavity, where some shower of volcanic ash 

 permanently plugged them, and where they remained 

 until the time of our visit. 



The tree thus preserved is more instructive than 

 any other that has come under my notice from any 

 part of the world. 



