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 parency or its Fluidity.

And here I shall put an end to the first Section, (containing our Notes about Cold) the design of which may be not a little promoted by comparing with them the beginning of the ensuing Section. For if it be true, that (as we there shew) the nature of Heat consists either onely or chiefly in the local motion of the small parts of a body Mechanically modified by certain conditions, of which the principal is the vehemency of the various agitations of those insensible parts; and if it be also true, as Experience witnesses it to be, that, when the minute parts of a body are in or arrive at such a state, that they are more slowly or faintly agitated than those of our fingers or other organs of feeling, we judge them cold: These two things laid together seem plainly enough to argue, that a Privation or Negation of that Local Motion that is requisite to constitute Heat, may suffice for the denominating a body Cold, as Cold-