Measures of large-scale structure in the CfA redshift survey slices

In three slices of the CfA redshift survey extension, variations of counts-in-cells as a function of cell size are the basis for two statistical measures of large-scale clustering which depend on the high-order moments of the distribution. The first statistic is an estimate of the filling factor derived from a percolation criterion: the structures in the CfA slices fill ~ 75 +/- 5% of the volume is devoid of bright galaxies [MB (0) _ ~ 4 are caused by clustering within the sheets. We identify the enhancements with small groups of galaxies (Ramella, Geller, & Huchra 1989) and/or sheets parallel to the line of sight. The rate of occurrence of enhancements caused by rich clusters like Coma is one order of magnitude smaller. By extracting samples from the CfA slices with similar spatial extent, we calculate that a narrow probe contains upward density fluctuations once in every ~ 120h^-1^ Mpc when the low-density regions in the survey have typical diameters of 20-50h^-1^ Mpc.