Logo
Prev
Bookmark
Rotate
Print
Next
Contents
All Pages
Related Articles
Browse Issues
Help
Search
Home
'
National Geographic : 1936 May
Contents
696THE NATIONAL GEOGRAPHIC MAGAZINE j Photograph by Gilbert Grosvenor SOMETIMES A PHOTOGRAPHER MUST TURN STEEPLE JACK Richard H. Stewart, GEOGRAPHIC staff photographer with the strato sphere expeditions, works on a lofty perch he built in a pine tree overlooking the Stratobowl to obtain a comprehensive view of the camp. of the flight, at 72,395 feet, there was a decrease in the number of recorded rays. WHERE COSMIC RAYS ABOUND At 40,000 feet the rays from the vertical were 40.1 times as many as those re corded from the ver tical at sea level. On the flight of Explorer I, July 28, 1934, the number found at 40, 000 feet was 42.3 times as many as those found at sea level. During the flight of Dr. and Mrs. Jean Piccard in the autumn of 1934 it was found that the ratio at 53,000 feet was 53.2; while dur ing the flight of Ex plorer II the ratio at that same altitude was 51.5. At 57,000 feet, dur ing the flight of Ex plorer II, the vertical rays were 55 times those coming in at sea level. This was the maximum value re corded. At 72,395 feet, the ceiling of the flight, the number of rays from the vertical direction had fallen to 42 times those at sea level. "We believe," says Dr. Swann, "that the explanation of this phenomenon is to be found in the assump tion that many if not nearly all of the rays observed are what we may call secondary rays, shot out from the atoms of the air by the primary rays entering from space. 696
Links
Archive
1936 Jun
1936 Apr
Navigation
Previous Page
Next Page