Table 15: Comparison of abundances in PN with WR central stars.
Elem. NGC 40 BD+30 3639$^\natural$ NGC 5315$^\dagger$ Solar(3)
He $\geq$0.046 $\geq$0.0053 0.124 0.098
C(-4) 19 7.3 4.4 3.3
N(-4) 1.3 1.1 4.6 0.84
O(-4) 5.3 4.6 5.2 4.9
S(-6) 5.6 6.4 12 21
Ar(-6) 3.4 5.2 4.6 2.5
Ne(-6) 1.4 1.9 1.6 1.2
$^\natural$ Abundances from Bernard-Salas et al. (2003).
$^\dagger$ Abundances from Pottasch et al. (2002).

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