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By Luther L. Terry M. D. (auth.), Burgess H. Jennings, John E. Murphy (eds.)

This symposium was once a joint attempt, co-sponsored through Northwestern collage and Borg-Warner company and integrated representatives of the latter-day estates of college, undefined, and executive. All of those teams have been deeply drawn to partaking, because the difficulties of guy and his atmosphere, in particular his city environ­ ment, are ones that are solved simply via a cooperative attempt. The symposium complaints current a evaluation of the current place of guy and his surroundings and description the actual and social-science efforts being made to unravel the issues posed via man's swiftly altering setting. The structure of this e-book is such that Dr. Luther L. Terry's speech, "Environmental overall healthiness: each­ body's Business," serves as an creation to the many-faceted dis­ cussions at the interactions of guy and his setting. Mr. P. B. Gordon's speech "Man and His setting - the place Are We? the place Are We Going"?" aptly summarizes this symposium and serves this goal during this ebook. each attempt was once exerted to make this symposium a normal dis­ cussion assembly the place contributions from either the formal audio system and the viewers have been bought. The documents of 2 panel discussions, together with reviews from the ground and replies via the audio system, are integrated during this quantity. This book is the results of the coordinated efforts of many members: the audio system, Northwestern collage, Borg-Warner company, the Symposium making plans Committee such as D. W.

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Additional info for Interactions of Man and His Environment: Proceedings of the Northwestern University Conference held January 28–29, 1965

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L! :! @ :E -5 1"" Fig. 10. Diagram indicating the extreme range of light intensities that the human eye confronts and the relation between the levels of cone and rod vision. The scale on the right shows that the range of visible intensities covers approximately 100 db, or a ratio of intensities equal to 10 billion to 1. (From S. S. ]. Wiley, New York, 1951, p. ) MAN'S RELATIONSHIP TO HIS SENSORY ENVIRONMENT 27 II I VIOLET --- -_/ /' / / Fig. 11. Similarity space representing judgment of the similarity of pure colors.

Shepard, "The analysis of proximities; Multidimensional scaling with an unknown distance function. " Psychometrika, Vol. 27, p. ) mately represent the difference in sensitivity between the cones and the rods. The rods have a maximum sensitivity at somewhat shorter wavelengths than the cones and, furthermore, they have a substantially greater overall sensitivity. Consequently, vision in very dim light is done primarily by the rod receptors. The cones, on the other hand, particularly those in the fovea, where the density of receptors is higher, have a much better spatial resolution than the rods, and detailed work such as reading is primarily a function of cone vision.

While our goal is the maintenance of a healthful environment for man, our first approach must be animal investigations in the experimental laboratory . In our laboratory, we use many species of animals as this gives us a much better perspective of the possible modes of response. Weusemice,rats,guinea pigs, rabbits, cats, dogs, men, and monkeys. When we need information on farm animals, plants, or insects, we turn to the agricultural people at our Bioproducts Res earch Center. When we are concerned with wildlife, we may study any of several of our native birds, animals, or fish.

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