(seq. 20)

Naturall Phylosophy chap. 3

and so deceive us (for sometimes ye clock strikes earlyer
and sometimes later yn it should) therefore, here is princi-
pally to be understood the motion of the Heavenly bodies (wch
is more regular and constant) as that of the Sun, whereby
hours, days, and years are measured.

Thus by ye motion of ye Centre of ye Sun 35 degrees or 15°/360
from east to west, of ye whole circle where in it is *for that
they supposed to move) we measure and account ye time
of an hour: and by its motion from west to east round its
supposed annuall circle, we measure or account ye time of
a year: yn by applying this duration of ye sun in motion
to ye duration of any other body, or bodily action, we say it
hath lasted (or had duration) one hour, or a year; of wch
see more in ye predicaments of Quantity & whereness.
This measure of ye duration of bodies is called Externall
time, bec{ause} it is externall to ye Sun or its motion.
N note, D{octor} Petty, among his novel deinitions calls time the
image of motion/ but I Think it move intelligibly expressed
by ye measure of durations; or as Mr Boyl, duration meassured.
Duration measured by Heavens motion,
gives of External time ye perfect notion.

4. Motion, or rather (mobility) the passive power is a change
from one term to another, ye two terms are from which,
and to which, from which is yt wch is left in motion. to
which is yt wch is acquired. and from this latter (to wch)
motion derives its unity: for, if I move my hand to a place
and make three stops by ye way, yn have I so many terms,
and therefore move that distance by three motions; whe-
reas, if I make No stop, 'tis all but one motion, hav-
ing but one term, to which, at ye end thereof.
Species of motion are commonly acounted Six, whereof
Instantaneous. 2
Successive. 4

1. Generation is a motion from an Essential forms not be-
ing to its being in ye matter. as ye Generation of man.
2. Corruption is on ye contrary from being to not being, as ye
Death of a man. these two are called Instantaneous, not
that they are in ye same instant, but bec{ause} they are in two
immediately succeeding instants; for so a man may be ali-
ve in this instant, and dead in ye next.
N: note, 'tis a common saying, ye generation of one thing is