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of motion

contained

in it,

increaseor

decrease;

and

increase

or

decrease

of either

is an

advance

towards

greaterdiffusion

or greater

concentration.

Continued

losses or

gains of

substance,however

slow,

imply

ultimate

disappearance

or

indefinite

enlargement;

andlosses

or gains

of

insensible

motion

will, if

continued,

produce

completeintegration

or

complete

disintegration.

Heat rays

falling on

a cold

mass,augmenting

the

molecular

motions

throughout

it, and

causing it

to