Abstract
The 1987 paper of Baylor, Nunn and Schnapf, Spectral Sensitivity of Cones of the Monkey Macaca Fascicularis, describes the action spectra of the red, green and blue cones in an old-world monkey, and its relationship to color-matching experiments in human observers. The action spectra were obtained using what was then a fairly new technique of suction electrode recording, applied for the first time to mammalian photoreceptors. Results will be discussed in the context of other concurrent discoveries in the field including microspectrophotometric measures of primate cones, the cloning of human cone photopigment genes, and the duplication and variation in cone photopigment genes in humans and monkeys.