its existence without (Stob. I. 18, 1), the Stoics
did the exact opposite affirming its existence without, and denying it
within the universe (Zeller 186, with footnotes). _Quae intervalla ...
possint_: there is no ultimate space atom, just as there is no matter atom.
As regards space, the Stoics and Antiochus closely followed Aristotle,
whose ideas may be gathered from R. and P. 288, 9, and especially from M.
Saint Hilaire's explanation of the _Physica_.

Sec.28. _Ultro citroque_: this is the common reading, but I doubt its
correctness. MSS. have _ultro introque_, whence _ed. Rom._ (1471) has
_ultro in utroque_. I think that _in utroque_, simply, was the reading, and
that _ultro_ is a dittographia from _utro_. The meaning would be "since
force plays this part in the compound," _utroque_ being as in 24 for _eo
quod ex utroque fit_. If the vulg. is kept, translate "since force has this
motion and is ever thus on the move." _Ultro citroque_ is an odd expression
to apply to universal Force, Cic. would have qualified it with a _quasi_.
Indeed if it is kept I suggest _quasi_ for _cum sic_. The use of _versetur_
is also strange. _E quibus in omni natura_: most edd. since Dav. (Halm
included) eject _in_. It is perfectly sound if _natura_ be taken as [Greek:
ousia] = existence substance. The meaning is "out of which _qualia_,
themselves existing in (being co-extensive with) universal substance (cf.
_totam commutari_ above), which is coherent and continuous, the world was
formed." For the _in_ cf. _N.D._ II. 35, _in omni natura necesse est
absolvi aliquid_, also a similar use _ib._ II. 80, and _Ac._ II. 42. If _in
utroque_ be read above, _in omni natura_ will form an exact contrast,
substance as a whole being opposed to the individual _quale_. _Cohaerente
et continuata_: the Stoics made the universe much more of a unity than any
other school, the expressions here and the striking parallels in _N.D._ II.
19, 84, 119, _De Div._ II. 33, _De Leg._ fragm. 1. (at the end of Bait. and
Halm's ed.) all come ultimately from Stoic sources, even if they be got at
second hand through Antiochus. Cf. Zeller 137, Stob. I. 22, 3. The _partes
mundi_ are spoken of in most of the passages just quoted, also in _N.D._
II. 22, 28, 30, 32, 75, 86, 115, 116, all from Stoic sources. _Effectum
esse mundum_: Halm adds _unum_ from his favourite MS. (G). _Natura
sentiente_: a clumsy trans. of [Greek: aisthete ousia] = substance which
can affect the senses. Th