Circular intensity differential scattering (CIDS) patterns have been calculated for two general types of chiral arrangements. The calculations were done using the second Born approximation. The geometries considered are (a) a linear array of anisotropic scattering groups with a spiraling orientation (a twisted ladder) and (b) a helical array of scattering groups with arbitrary anisotropy and orientation. The CIDS expressions for the first of these models (twisted ladder) reduces to a simple analytical form and clearly illustrates many properties of CIDS patterns. The second geometry (helix) is more general. Calculations were done for oriented scatterers and for rotationally averaged scatterers as would be found in solution. Copyright © 1985 John Wiley & Sons, Inc.