We have measured the conductance and Young's modulus of sheets of randomly holed metallized Mylar. The percolation threshold is $p_c=0.34\mathrm{}\pm 0.02$, the conductivity exponent is $\overline{t}=1.4\mathrm{}\pm 0.2$, and the elastic exponent, $\overline{f}=5.3\mathrm{}\pm 0.7$, is at least $\frac{3}{2}$ larger than that for lattices. This confirms Halperin, Feng, and Sen's prediction [Phys. Rev. Lett. 54, 2391 (1985)].

• Received 3 December 1986

DOI:https://doi.org/10.1103/PhysRevB.36.3960