52 



letters, you favour us with some information, respecting these won- 

 derful bodies, which have actually passed, from the vegetable to the 

 mineral kingdom. 



Yours, &c. 



LETTER VII. 



1 ( 



VEGETABLE FOSSILS.. ..FOSSIL TREES. ...DESCRIBED BY THE AN- 

 CIENTS.. ..BY THE MODERNS. ...FOUND IN ALMOST EVERY PART 



OF THE WORLD. 







JT has been my endeavour, in my preceding letters, to furnish you 

 with some general and useful notions, respecting secondary fossils 

 in general ; as well as with some general account of those . sub- 

 stances, which will be found most frequently concerned, in the im- 

 portant changes which secondary fossils have undergone. 



VEGETABLE FOSSILS, will now, very properly, according to the 

 arrangement I have adopted, become the subjects of our investiga- 

 tion. This also will be the proper moment for their consideration ; 

 since the curious phenomena you lately beheld, have, it is very evi- 

 dent, excited your curiosity and interest, respecting their particular 

 changes, to a very considerable degree. 



Vegetable fossils *, I shall divide into the following orders : 



* Phytolithi, of Linnaeus and Wallerius. 



