38 The Philippine Journal of Science 1922 
(2) Lubricating oil for light machinery . . . some 40 per cent 
by volume. 
(3) Heavier lubricating oil, by distilling off the light portion, and 
refining the residuum with sulphuric acid, washing with 
water, some 20 per cent by volume. 
Samples of these products were made in the laboratory with amounts 
obtainable indicated, and these submitted with this report. 
‘Exploitation —Diligent search within a radius of several miles 
of the seep for favorable oil structures was made, but none was 
found. It is true, one little anticline, only a few meters in 
width, was seen in a section along the banks of Malitabug River, 
but this indicates merely a local roll and nothing of economic 
importance. In fact, the Vigo formation is so badly disturbed 
for some kilometers from this.seep that it is extremely doubt- 
ful that a suitable structure could be found. The writer is 
informed that the present drilling sites in Borneo are about 
50 kilometers from the discovery seeps. In general, it would 
be good policy to go some distance from this locality in a search 
for favorable structures. The writer does not hesitate to con- 
demn all the country within a radius of 10 kilometers of this 
seep. However, he is of the opinion that further intensive geo- 
logical exploration in the country to the east and south of this 
oil seep not only would be justified but would probably yield 
results. This subject is discussed further in a later paragraph. 
It is not sufficient merely to find oil in the rocks; there must 
be oil in sufficient quantities and in an accessible location so 
that it can be marketed economically. As this is just where many 
oil-development projects fail the writer takes particular pains 
at this time to indicate some of the factors involved in the 
development of a region like this one. ; 
In the first place, there must be the preliminary geological 
exploration, conducted in much greater detail than was the sur- 
vey upon which this article is based. This will require the serv- 
ices of two or more geologists and assistants working steadily 
for at least six months, and possibly a year. This is the mini- 
mum, and it would be well to expect to spend at least 15,000 
pesos in making such a survey. 
Next will come the building of a road, in order to get machin- 
ery to the drill site. The writer has heard of estimates of 25,000 
dollars (50,000 pesos) for the total cost of a road into this 
locality. Such estimates are absurd. It will cost in the neigh- 
borhood of a half million pesos, and very probably much more, 
to build a suitable road in this locality. 
