dered as a very active _motor_, only acts thus by
sending to the muscles which necessarily cause these movements and
actions the nervous fluid which excites them....

"Indeed, as the result of organic or vital movements which are
produced in every animal, that which possesses a nervous system
sufficiently developed has physical sensibility and continually
receives in every inner and sensitive part impressions which
continually affect it, and which it feels in general without being
able to distinguish any single one.

"The sentiment of existence [consciousness] is general, since almost
every sensitive part of the body shares in it. 'It constitutes this
_me_ (_moi_) with which all animals, which are only sensitive, are
penetrated, without perceiving it, but which those possessing a
brain are able to notice, having the power of thought and of giving
attention to it. Finally, it is in all the source of a power which
is aroused by wants, which acts effectively only by emotion, and
through which the movements and actions derive the force which
produces them'....

"Finally, the inner feeling only manifests its power, and causes
movements, when there exists a system for muscular movement, which
is always dependent on the nervous system, and cannot take place
without it."

The author then states that these emotions of the organic sense may
operate in the animals and in man either without or with an act of their
will.

"From what has been said, we cannot doubt but that the inner and
general feeling which urges the animals possessing a nervous system
fitted for feeling should be susceptible of being aroused by the
causes which affect it; moreover, these causes are always the need
both of satisfying hunger, of escaping dangers, of avoiding pain, of
seeking pleasure, or that which is agreeable to the individual, etc.

"The emotions of the inner feeling can only be recognized by man,
who alone pays attention to them, but he only perceives those which
are strong, which excite his whole being, such as a view from a
precipice, a tragic scene, etc."

Lamarck then divides the emotions into physical and moral, the latter
arising from our ideas, thoughts--in short, our intellectual acts--in
the account of which we need not follow him.

In the succeeding chapter (V.) the author dilates on the force which
causes actions in animals. "We know," he says "that plants can sati