. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. 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
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. 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. FIG. XO. 6. HYTHERGRAM OF A STROLL OVER OFFICL\L WASHIXGTOX On July 12 the author put the hythergraph in his pocket and walked about the ci;T of Washington. The portions of the record inclosed in arrows show the temperature and relative humidity of the United States Senate Chamber during President Harding's speech (2 to .3 ). It is be- lieved to be the first time that a record was made of the air temperature and air moisture in this liuilding during a presidential address. The record shows that the temperature during President Harding's speech ranged from 80° to 82°. and the relative humidity from 78% to 83%. 82. 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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