VICINITY of EDINBURGH. 433 
greenftone. The fpecimen No. 79. fhews a portion of the 
‘fandftone, with that fubftance traverfing its ftratified lines dia- 
gonally. No. 80. is a mafs of the fandftone, containing a 
{mall portion of greenftone, much of the fame fhape as the 
double wedge of St Leonard’s Hill, and formed, as I conceive, 
exactly in the fame manner. This wedge, on one fide of the 
fpecimen, is two inches long, but, on the oppofite, it is not 
one; and in the counter part of the fame fpecimen, (No. 81.) 
it is only to be feen on one furface ; it does not penetrate to the 
other fide, though fearcely an inch thick. ;, 
T am glad to find, that intereft has been made to prevent 
this valuable fet of fa@s from being foon deftroyed, as, in a 
few weeks, the rock in which thefe are contained would have 
been broken down, and carried off for the repair of the neigh- 
bouring roads. 
Ir is on this account, that much activity is requifite to keep 
thefe perifhable phenomena from being loft, in the neighbour- 
hood of fuch a town as Edinburgh. Similar things are pre- 
fenting themfelves conftantly, but they are opened only for a 
day, and if not feized and recorded on the inftant, will be thut 
up, and loft for ever. 
END OF THE SIXTH VOLUME. 
