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The 22° halo and the upper tan-gential arc. The photograph, which covers the entire sky, was obtained by photographing the reflection in the convex surface of a reflecting sphere. The entire horion, camera, tripod, and author are visible. See page 128. [R. G. Greenler, University of Wisconsin, Milwaukee]


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Science. ISSN 0036-8075 (print), 1095-9203 (online)