National Geographic : 1953 Aug
\ 0o 0000 00 oo So o 000ooo 0o G? **, i"°r"- . •s °°o ^^^.^ -t/A 231 Mount McKinley's South Peak Provides a Lofty Site for Cosmic Ray Studies More of these powerful rays reach the earth's surface near the Poles than elsewhere; they are best studied at high altitudes (page 219). One object of the author's 1951 trip was to pioneer a route (marked) by which this great natural laboratory would be more accessible to scientists.