contiguity, 42;
causation, 43;
by a kind of pre-established harmony between the course of nature
and our ideas, 44;
this operation of our minds necessary to our subsistence and so
entrusted by nature to instinct rather than to reasoning, 45.

_Probability_, 46-7.

Belief produced by a majority of chances by an inexplicable
contrivance of Nature, 46 (cf. 87-8);
probability of causes: the failure of a cause ascribed to a secret
counteracting cause, 47 (cf. 67);
it is universally allowed that chance when strictly examined is a
mere negative word, 74.

D. _Power_, 49-57.

Power, force, energy, necessary connexion must either be defined by
analysis or explained by production of the impression from
which they are copied, 49;
from the first appearance of an object we cannot foretell its effect:
we cannot see the power of a single body: we only see
sequence, 50.

Is the idea of power derived from an internal impression and is it an
idea of reflection? 51;
it is not derived, as Locke said, from reasoning about power of
production in nature, 50 n;
nor from consciousness of influence of will over bodily organs, 52;