. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Exposure of hythergraph on a free-balloon flight—In operation, the instrument is suspended from the concentration-ring of a balloon. This is a wooden ring to which is attached the net encompassing the gasbag. Below the concentration ring is suspended the basket. Fig. 3 shows such a record which was made during a voyage from the campus of the Southern Branch of the University of California on June 8, 1920. This free-air flight was part of the instruction tendered the classes in meteorology by t
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Exposure of hythergraph on a free-balloon flight—In operation, the instrument is suspended from the concentration-ring of a balloon. This is a wooden ring to which is attached the net encompassing the gasbag. Below the concentration ring is suspended the basket. Fig. 3 shows such a record which was made during a voyage from the campus of the Southern Branch of the University of California on June 8, 1920. This free-air flight was part of the instruction tendered the classes in meteorology by the writer. This interesting and In- structive demonstration of the effectiveness of meteorological know- ledge in guiding a balloon to a previously designated location was made possible through the courtesy of the Chief of Air Service, War Depart-. 7 3 9 2 3 FIG. XO. .5. HYTHERGRAM OF A U. S. ARMY DIRIGIBLE FLIGHT On July 8, 1921. the U. S. Army Airship C-2 made a voyage from Langley Field to Portsmouth. Va. and return in order to test the hythergraph. The above reproduction sliows the record sheet made on that trip. The record shows the following data: Time Temperature 9:00 88° 9:10 82° 9:20 80° 9:30 82° Relative Hum. Time Temperature Relative Hum. 88% 9:40 88° 78% 82% 9:50 91° 63% 84% 10:00 89° 64% 88% Maximum temperature, 91° at 10:02 a. Minimum temperature, 80° at 9:20 a. m.; Maximum relative hvimidity 88% at 9:00 a. m.; Minimum relative humidity, 61% at 10:02 a. 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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