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_. §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 ουσια = 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 αισθητη ουσια = substance which can affect the senses. The same expression is in _N.D._ II. 75. It should not be forgotten, however, that to the Stoics the universe was itself sentient, cf. _N.D._ II. 22, 47, 87. _Teneantur_: for _contineantur_; cf. _N.D._ II. 29 with II. 31 _In qua ratio perfecta insit_: this is thorough going Stoicism. Reason, God, Matter, Universe, are interchangeable terms with the Stoics. See Zeller 145--150 By an inevitable inconsistency, while believing that Reason _is_ the Universe, they sometimes speak of it as being _in_ the Universe, as here (cf. Diog. Laert. VII. 138, _N.D._ II. 34) In a curious passage (_N.D._ I. 33), Cic. charges Aristotle with the same inconsistency. For the Pantheistic idea cf. Pope "lives through all life, extends through