42 PROCEEDING 3 OE THE SCIENTIFIC ASSOCIATION, 
ation into lignite and liiglily impregnated with this sub- 
stance were excavated 40 feet below the surface. Now 
these occurrences, while they indicate that the Tar is of a 
very penetrating nature and comes up to the surface from 
beneath by the infiltration of water, which being the hea- 
vier fluid, naturally replaces and causes it to ascend up- 
wards, go also to shew that the Tar or Petroleum, using 
them as synonymous terms, may be discovered under any 
part of the island. Of course, the Scotland formation 
being denuded of the coralline superstructure, renders the 
Tar more accessible there ; and he who would seek for it 
elsewhere must have first to penetrate the coral rock ere he 
attain with equal facility the same favorable stand-point 
for boring for Tar, as in the Scotland formation. At the 
same time, another fact remains to be considered in rela- 
tion to boring for Tar, and the unequal distribution, as to 
its thickness, of the coral rock ; namely, that while the 
Scotland formation extends in an almost semicircular line 
between tho extreme points of the Cove Bay in St. Lucy’s 
parish, and Skoot’s Bay in St. Philip, the chalk of tho 
Scotland series again makes its appearance at duff’s Bay 
at the northern end of the island with a few feet only of 
the coral suporimposed ; and also that some of the sand- 
stones of the same series of rocks are observed to 1 1 crop 
out ” on several estates in St. Lucy — at Springhalt, for in- 
stance ; where they actually form part of tho cultivated soil 
of that proporty. Here then, in this locality and in others 
similarly circumstanced, the indications for boring may 
probably be found to be as favourable as others in the 
Scotland formation. 
That there are affinities botween the Asphalts of Trinidad 
and Barbados, there can be no question ; but differences 
of composition exist I am aware. In what these differ- 
