Active HEPA Filter can be used in S4000 and S5000 canisters as well as **S2** and S7 uprights.

Type G/N AirClean Filter Bags are used for both **S2** and S5 models.

The same variation occurs at the neighbouring Teos and at Ephesus, while the coins of Mesembria in Thrace show regularly Meta and M ET A M B P I A N **S2** N, where represents the sound which resulted from the fusion of By, and which appears in Homer as Qa in ï¿½ Vvos, while in later Greek it becomes piaos.

If the axes are rectangular, the direction-ratios become direction-cosines, so that X1 + ~**s2** + vi = I, whence R2 = X1 + ~2 + Z2.

Z, v' -V --zP - x R b2 2b2 c2 **S2** 1 z a2+ 2b2S23x, w' = w -{-xQ-yP2c2 cl?

Next, if the line **S2** touch at b the arc aa so that the two portions ab, ba lie on the same side of the line Sl, then projecting the figure as before, the tangent at b, that is, the line **S2** itself, is projected to infinity; the arc ab is projected into a parabolic leg, and at the same time the arc ba is projected into a parabolic leg, having at infinity the same direction as the other leg, but so that the two legs may or may not belong to the same branch.

In the case of the sphere, for instance, whose radius is R, the area of the section at distance x from the centre is lr(R 2 -x 2), which is a quadratic function of x; the values of So, Si, and **S2** are respectively o, 7rR 2, and o, and the volume is therefore s.

The Greeks themselves, however, did not call **S2** omega (great o) nor did they call 0 omicron (little o), though these names are given even in modern Greek grammars.

We have a sequence So, Si, **S2**, ...

If a line **S2** cut an arc aa at b, so that the two segments ab, ba lie on opposite sides of the line, then projecting the figure so that the line Sl goes off to infinity, the tangent at b is projected into the asymptote, and the arc ab is projected into a hyperbolic leg touching the asymptote at one extremity; the arc ba will at the same time be projected into a hyperbolic leg touching the same asymptote at the other extremity (and on the opposite side), but so that the two hyperbolic legs may or may not belong to one and the same branch.