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Or, if nothing better were
to be had, I might supply my wants with mere bread, and I should find
the protoplasm of the wheat-plant to be convertible into man with no
more trouble than that of the sheep, and with far less, I fancy, than
that of the lobster.
Hence it appears to be a matter of no great moment what animal, or what
plant, I lay under contribution for protoplasm, and the fact speaks
volumes for the general identity of that substance in all living beings.
I share this catholicity of assimilation with other animals, all of
which, so far as we know, could thrive equally well on the protoplasm of
any of their fellows, or of any plant; but here the assimilative powers
of the animal world cease. A solution of smelling-salts in water, with
an infinitesimal proportion of some other saline matters, contains all
the elementary bodies which enter into the composition of protoplasm;
but, as I need hardly say, a hogshead of that fluid would not keep a
hungry man from starving, nor would it save any animal whatever from a
like fate.


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