. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. 44 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES the pole, drive a stake. Connect these stakes by a stout string 3x/2 feet above the ground, and from each stake, at that height, stretch a string to the top of the pole. In Fig. 4, A is the station, Aa the pole. At distances and heights stated, the stakes Bb and Cc are connected by string be; and strings stretch from a to b and from a to c. An observer, full length on the ground, his head at A and feet toward the stakes, scanning at his ease that part
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. 44 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES the pole, drive a stake. Connect these stakes by a stout string 3x/2 feet above the ground, and from each stake, at that height, stretch a string to the top of the pole. In Fig. 4, A is the station, Aa the pole. At distances and heights stated, the stakes Bb and Cc are connected by string be; and strings stretch from a to b and from a to c. An observer, full length on the ground, his head at A and feet toward the stakes, scanning at his ease that part of the sky which appears within the triangle of strings, abc, will see just one-eighth of all the clear sky above .the hazy zone around the horizon 30 degrees high. Eight observers so placed about A, each watching only the part of the sky marked off by his; tri- angle of strings, would see all the shooting stars that appear in the clear sky while they watch. On a fair evening it is found that each such observer sees a shooting star about every four minutes, or an average of 16 per hour. Eight observers see 128 shooting stars per Thus through the upper air surface—all of it that is above the 30 degree belt around the horizon—there must enter daily 24 times 128 shooting stars, or 3072 per day. Fig. 5 will serve to show the full significance of this result—. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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