title: A simple order sorter for use with diffraction gratings blazed for high orders.
abstract: A predispersion device is described for use with stigmatic spectrographs equipped with a grating blazed for high orders. It employs the Wadsworth prism-mirror arrangement and is extremely simple both to construct and to operate. Data are given to enable the device to be used with a prism of crown glass, heavy flint glass, or fused quartz.
authors.affiliation: Department of Physics, University of Alberta, Edmonton, Alta., USA.
authors.forename: E H
authors.initials: EH
authors.lastname: Pinnington