6.Al7 FIGURE 6.A6: SHIELDING EFFECT OF ATMOSPHERE .-i 300 I s .µ <1l .-i I u ~ 200 (Y) I s u Ul <:: .8 100 x Meters of Water Results from balloon flights at four different latitudes: A. Saskatoon, Canada B. Omaha, Nebraska C. San Antonio, Texas D. Madras, India 60° N 51° N 38° N 3° N From Bowen, Millikan and Neher, Physics Review~, 1938.
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