concatenated circle of motions will nevertheless proceed in due order; as
whilst you are thinking on this subject, you use variety of muscles in
walking about your parlour, or in sitting at your writing-table.

5. Innumerable catenations of motions may proceed at the same time, without
incommoding each other. Of these are the motions of the heart and arteries;
those of digestion and glandular secretion; of the ideas, or sensual
motions; those of progression, and of speaking; the great annual circle of
actions so apparent in birds in their times of breeding and moulting; the
monthly circles of many female animals; and the diurnal circles of sleeping
and waking, of fulness and inanition.

6. Some links of successive trains or of synchronous tribes of action may
be left out without disjoining the whole. Such are our usual trains of
recollection; after having travelled through an entertaining country, and
viewed many delightful lawns, rolling rivers, and echoing rocks; in the
recollection of our journey we leave out the many districts, that we
crossed, which were marked with no peculiar pleasure. Such also are our
complex ideas, they are catenated tribes of ideas, which do not perfectly
resemble their correspondent perceptions, because some of the parts are
omitted.

7. If an interrupted circle of actions is not entirely dissevered, it will
continue to proceed confusedly, till it comes to the part of the circle,
where it was interrupted.

The vital motions in a fever from drunkenness, and in other periodical
diseases, are instances of this circumstance. The accidental inebriate does
not recover himself perfectly till about the same hour on the succeeding
day. The accustomed drunkard is disordered, if he has not his usual