Three methods were used to assess the influence of a number of realistic sound stimuli on esthetic evaluations of outdoor settings. We reproduced 18 sounds-including those of children, songbirds, construction equipment, automobiles, aircraft, and wind-for college students serving as evaluators at field sites ranging from a forest to a downtown street. In two other procedures, settings and sounds were described in a questionnaire, or were presented using photographs and tape recordings. All.three procedures produced similar results; natural and animal sounds had enhancing effects on evaluations of the heavily wooded natural and residential sites, and other sounds had detracting effects on the same sites. The sounds were relatively neutral in effect at two downtown streets, where traffic sounds were found to be most enhancing. The results show that the interaction of a setting's visual and acoustic characteristics significantly influences evaluations of that setting, and that appropriateness of sounds only partly accounts for their influence on setting quality.

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The hyperfine structure of the seven lowest atomic levels in Co 59 has been examined with the atomicbeam magnetic-resonance technique. Quantitative agreement with earlier measurements is found for those states for which results have been published. All of the results are corrected for the effects of off-diagonal hyperfine interactions, and the effective-operator theory used for the interpretation also takes into account such effects as intermediate coupling, configuration interaction, and relativistic effects. The emphasis is on examining the consistency of the results from state to state. Although a very high degree of agreement between theory and experiment is found, some difficulty is encountered in understanding details of the quadrupole interaction. Values for the quadrupole moment of the Co 69 nuclear ground state are determined in each of two electron configurations. The difference between the two values found is well outside experimental error and is presumably due to different Sternheimer shielding in the two configurations. The value found for Q is consistent with earlier determinations and with nuclear theory. Values are given for the electronic g factor in each state examined.

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