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Classification of the Sci
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a mode of life, it is proper to take as the unit science the scientific mode of life fit for an individual person. But science being essentially a mode of life that seeks coöperation, the unit science must, apparently, be fit to be pursued by a number of inquirers.

It seems plain that with these definitions, the classification cannot be concerned with all possible sciences, but must be confined to actually realized sciences. If, however, this limitation is to be maintained, the question will arise, To what date or stage of scientific development is the classification to relate? According to the general spirit of this book, which values everything in its relation to Life, knowledge which is altogether inapplicable to the future is nugatory. Consequently, our classification ought to have reference to the science of the future, so far as we are now able to foresee what the future of science is to be. It will therefore be