TABLE III.

The nonlinear contribution to the susceptibility at $E=100\text{kV}/\text{m}$, (Exact) as calculated from the two-level system, or (Telescoping) with a telescoping series based on the difference of the susceptibilities of two different fields. The label “2,” “4,” or “8” implies there is a factor of 2, 4, or 8 difference between these two fields

	${10}^6\mathrm{Re}{n}^{(\text{NL})}$
Exact	−34.32
Telescoping 2	−34.26
Telescoping 4	−34.30
Telescoping 8	−34.46