Wilbert Smith Archives Files Box 1136 05 1136-05-p082

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‘The following points should be carefally noted about these histograms: {) The negligible number of sightings when the sun is within 10* of the zenith and nadir (angle of elevation of the sun = £90*) of the observer is due to the fact that the southern- most latitude of the U. S. is greater than the declination ‘of the sun at the summer solstice, so that it would be im- possible for the sun to reach the zenith or nadir of any observer in the U. S. (where most of the sightings were made). (2)...