f 34 ] 
iuxurknt Imaginary fyftems, which rather force than 
elucidate, and very little agree with the laws of na- 
ture. Who hitherto has ever rightly explained the 
origin of mountains ?, We perhaps know fome par- 
ticular caufes, but how can we draw from them ge- 
neral conclufions ? The bones of animals, which are 
found in the interior filTures of the mountain, demon- 
ftrate it to be formed by a ruinous cai.fe. This 
fuffices not to explain, but only to illuftrate, the fub- 
jed:. In the annexed Plate I. A is the mountain 
Taberg. B, B, the heaps of broken ore. C, C, C, 
the fand brought forth from the fiffures. Z), D, the 
neighbouring ftony rock j and £, the miners houfes. 
I am, 
SIR, 
Peter Afcanius, 
IX. Account of an extraordinary Cafe 
of a Child. By Mr. Richard Guy, Sur- 
geon. 
Read Feb. 13. Jk Child near feven years of age, the 
*755- daughter of an eminent tradesman 
in Bilhopfgate-ilreet, having languifhed, for near 
twelve months part, of a fuppofed dropfy, and un- 
dergone the moft fkilful treatment of feveral eminent 
phyficians unfuccefsfully, died in an emaciated date. 
By defire of the parent, I opened the body, ex- 
pecting to find water, but, to my great furprize, 
there appeared as follows : A large round folid fub- 
ftance, fliaped in the form of an egg, weighing 
fourteen 
