Man's physical universe

xanabras

288 FORMS OF ENERGY

ploitation of human beings.

Today, man has a greater freedom than

ever before; but a new kind of slavery, that of the machine-tender, is

possible.

It is important, therefore, that we understand, as far as possible, the

nature of this energy that man has harnessed and how he has harnessed

it,

in order that these modern problems may be faced intelligently.

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