Alteration of Curve Shape on Circular Recorders Spectra are usually recorded on rectilinear axes. However, the existence of a circular chart drive for the Beekman 5-in. recorder originally sold far use with the DB series spectrophotometers suggested an inquiry into the nature of spectra recorded on circular charts. .~ For eomjmriam, n pure ( h s ~ i m peak is presented in the fiwr~huth rectilinearly and circularly, with the hoselineat the ouLsideanda1suat theinsiue
