MAN'S WAY OF HELPING HIMSELF
149. Labor-saving Devices. To primitive man belonged more especially
the arduous tasks of the out-of-door life: the clearing of paths
through the wilderness; the hauling of material; the breaking up of
the hard soil of barren fields into soft loam ready to receive the
seed; the harvesting of the ripe grain, etc.
[Illustration: FIG. 91.--Prying a stone out of the ground.]
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