Beside the equivalence of the hon to 5 utens weight of water, the mathematical papyrus (35) gives 5 besha = (2/3)cubic cubit (Revillout's interpretation of this as 1 cubit cubed is impossible geometrically; see Rev. Eg., 1881, for data); this is very concordant, but it is very unlikely for 3 to be introduced in an Egyptian derivation, and probably therefore only a working equivalent.
The tema is the same name as the large wheat measure (35), which was worth 30,000 to 19,000 grains of copper, according to Ptolemaic receipts and accounts (Rev. Eg., 1881, 150), and therefore very likely worth to utens of copper in earlier times when metals were scarcer.
$radw b el than"' s o e5 theucr r t ?l t of eg o?pUer, atus 1, ?
Eg, Stem of the nephridium leading to no, its external aperture.
Not too much weight must be attached Eg) ater evidence on this point; for the New Kingdom and still foui re the Graeco-Roman period witnessed a strange recrudescence aco upposed primitive cults, to which they gave a form that may po~ nay not have been historically exact.
Any number of points on the parabola are obtained by taking any point E on the directrix, joining EG and EF and drawing FP so that the angles PFE and DFE are equal.
Then EG produced meets FP in a point on the curve.
F B is the evolute of this circle, and for any radius DE at an angle a and corresponding tangent EG terminated by the evolute, the perpendicular distance of G from the line AD is c(cos a+a sin a).
Doc. Eg., iii.