C 725 ) 
What I here prefcnt you, is concerning M//;^r4/ fubfiancei 5 
for, having liv'd fome years on Mendip-hiBs in Smerjet fhire^ 
andrcfidingatprefentbuta miieonthe North-fide of them, I 
have had an opportunicy to make fomV Obfervations in Mines, 
I find in feveral of the tranfa^liom a mention made of Minerals, 
but what 1 fliall here imlft on, relates chiefly to what I find 
JSLioo,p.6i S r; where is adefcription of certain Stones figiir'al 
like Plants, and by feme obferving men(as you fay)eftcem'd to 
be Plants petrified , couTmunicated by Mr. Lijler \ whofe-de* 
fcriptions I (haU confirm and inlarge according to my Obfer- 
vations here ; being very joyful , that fo good a hand has fore- 
ftaird a good part of that little news which I might otherwife 
bavefent you concerning thefe Mineral produifions. 
1, All rbe Tmhiumd £»/m^/ defcribed with their figures 
fey Mx^hifter-i are found on thofe Hills;! having had the feveral 
fpecies by me thefe many years^esfcept that figur'd like a fruit. 
And as to the length of ihc Er/tmhi, the tbinnefs and thicknefs 
of their joy nrs,the fmoothnefs of feme in their eutward circle, 
the ridges and knots of o hers, the branches, the degrees of 
greatnefs and fmallnefs of the Tw^/M aud the like, my obfer- 
vations generally concur with his, and fo concerning their 
accidental Injuries. I have that fpecies of Entrcchi^ which is 
tapering at both ends,and fwells in the middle , and I find even 
the joynrsof fome are of that make^ fo that an E/^tmhosfhcw^ 
Jikea parcel of little barrels, fet one on the other. I have like* 
wifkhis Sumwitates or fafiigia, btlng long and flender pieces 
with a little button on the top ; but more of thefe in their due 
place, 
2. As to iheif Hollows, I find them of allbigoefTeSj from a 
central point to the taking up of m )re than a third part of the 
Scone V fome of the £;?/w^/ are fo hollow, that there is only a 
thinfhell lef^jfrnooth within and without : Oihershaveonlya 
thin fliell lefr, but with fcrews within and without ; and fome- 
times both thefe are one f ntire piece with feemiog futures. The 
holloves 2Jt generally round according to Mr-L^/^r's defcrip- 
tion ; though I have alfo many fingle joynts and E^trcchiywhofc 
hollows are like a cinquefoil j and though this bore be mod fur* 
prizing (as he fays) yet,methinks,*cis moft natural to the radJx^ 
which has five hollow flirts or feet iflfaing fide^waysfrcm itac^ 
cotdingto the figure; And I find in fome pieces of radix's^ 
which 
