26 E. E. ROSAIRE 
ology remains one of the ends, but no longer the primary means of dis- 
covery. In that recent ‘Stone Age’’ of optical exploration, strategy 
and tactics were practically one and the same. The giants of those 
days were not called on to ride airplanes, have diurnal worries, elim- 
inate temperature coefficients, and see that dynamite was kept harm- 
less. Although the tacticians of today are shouldering these necessary 
evils, the successful strategist of today must take them in his stride. 
And what of tactics in the future? Well, some modern strategists 
are bound to break with tradition and, disregarding the areal con- 
demnations of Stone Age, optically-minded strategists, subiect some 
of the featureless Tertiary covered areas, now in disfavor, to examina- 
tion by modern tactics, and thereby enjoy the thrill of organizing a 
campaign from the library stage on. 
In those areas which are as yet unexplored by any geophysical 
method, and which so have possibilities of shallow production, perhaps 
the electrical method may some day actually locate petroleum in situ. 
As long as marginal prospects can still be discovered by the torsion 
balance, the gravity meter, the magnetometer and the refraction 
seismograph, the improvement of these methods is justified. Further, 
as long as prospects remain to be evaluated or discovered by the re- 
flection seismograph, its improvement is justified. Finally, as long as 
areas remain unexplored because of problems which cannot be solved 
even by the newer tactics, careful, cautious research on still newer 
methods is justified. 
And beyond that? Well, with hydrogenation of coal in. the pilot 
plant stage, with the development of oil shale refining in its infancy, 
and with the decrease in the cost of manufacturing alcohol to be ex- 
pected from probable advances in chemistry, the pessimistic strate- 
gist in exploration may be like some other strategist of the not far 
distant past, who, envisioning faintly the United States of today, but 
without anticipating the automobile, wondered and worried about 
the future distribution of corn and wheat between man, mule, and 
moonshine. 
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