C 2 3 r ] 
N°. 7. The feme author, Volckman, figures a 
fomewhat-like imprefiion, ibid. fig. 5. 
Only thefe feven extraordinary impreflions I have 
prefumed, my Lord, to treat of at this prefent time ; 
but I have many more in my cabinet equally curious, 
fomefew of which I here exhibit to the Society, with- 
out taking any further notice of them : only I fhall 
add, that many extraordinary impreflions occur in 
Woodward’s and other collections, and many are 
iconed in authors, worthy the attention of the curious. 
Thefe impreflions, my Lord, are not only met 
with in fmall pieces ; but large evident branches, 
fome feet in length, have been found. I have, in the 
collieries of Derbyfhire, frequently traced branches 
with (what feemed to me) long narrow leaves pro- 
ceeding from them, and parts of other vegetables, 
above a foot’s length but the hardnefs of the fub- 
ftance they are immerfed in renders it impofiible to 
get them out without breaking them to pieces (2).. 
As thefe remains of vegetables are very extraor- 
dinary, I would recommend to the curious in botany 
to take notice of them, as an Appendix P'lantarum 
adhuc incognitarum . For my part, I am fo very 
little fkilled in botany,, that I hardly prefume to 
offer my opinion ; which, is, that they are impref- 
fions and parts of fpecies of the firs and pines, of 
the tithymals, the cereus’s, and other arborefcent 
plants, and of large reeds j for fome of the laid 
(2) Woodward, Catalogue B. p. 104.. fpecimen q. 1. was of 
6 i-half feet in length ; and Catalogue D. p. 60. fpecimen h. 38. 
was a yard long ; et alibi pajfm. In the collieries at Swanvich in 
Derbyfhire, in 1752. a plant of the cane kind was found 14 feet 
long : it ended in a point at one end, and at the root in a large, 
knob, and in the middle meafured nine inches about. 
kinds 
