$_{-}$8.5 $_{-}$8 $_{-}$7.5 $_{-}$7 15 17.5 20 22.5 25 27.5 30 GLYPH<D0>GLYPH<D3>GLYPH<CV> GLYPH<BD>GLYPH<BC> GLYPH<CJ> GLYPH<AL> GLYPH<B4>GLYPH<D1>GLYPH<B5>℄ GLYPH<D0>GLYPH<D3>GLYPH<CV> GLYPH<BD>GLYPH<BC> GLYPH<CY> GLYPH<AB> GLYPH<CY> FIG. 2: Constraints on the parameters of Yukawa-type interaction from proposed measurements of the normal Casimir force between a smooth sphere and a corrugated plate (the grey line), from measurements of the lateral Casimir force between corrugated surfaces (the solid line), and from measurements of the normal Casimir force using a micromachined oscillator (the short-dashed line). The allowed regions in the ( λ, α )-plane lie beneath the lines. 25