. Turkey Lake as a unit of environment, and the variation of its inhabitants ... Biology; Natural history. 238 Air. Surface. Bottom. From December 3 to noon of the 20th the lake was covered with ice. During this period the surface temperature varied from 33° to 34£° and the bottom from 35° to 36°. At 5:00 p. M. of the 20th, ten hours after the ice started to move in a body from the lake, the surface showed 35J°, a gain of 2J°; the bottom 37^°, another gain of °, and in the shallow water, fifty feet from south shore, where it had been 32°, 33°. 33° on the 7, 8 and 9th respe
. Turkey Lake as a unit of environment, and the variation of its inhabitants ... Biology; Natural history. 238 Air. Surface. Bottom. From December 3 to noon of the 20th the lake was covered with ice. During this period the surface temperature varied from 33° to 34£° and the bottom from 35° to 36°. At 5:00 p. M. of the 20th, ten hours after the ice started to move in a body from the lake, the surface showed 35J°, a gain of 2J°; the bottom 37^°, another gain of °, and in the shallow water, fifty feet from south shore, where it had been 32°, 33°. 33° on the 7, 8 and 9th respectively, it was now 43°, a gain of 10°. The next day surface and bottom both registered 37° degrees at the twenty- five-foot station. The results of these observations are embodied in the accompanying profile chart, in which it has been attempted to show the absolute and relative move- ments of the air, surface, and bottom of lake at a depth of twenty-five Temperatures from September 23 to December 23. Broken line, temperature of air; dotted line, temperature of water 25 feet below surface on the bottom; continuous line, tem- perature of water at the surface at the same 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 Indiana. Biological station. Indianapolis, Wm. B. Burford
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Photo credit: © Central Historic Books / Alamy / Afripics
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Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1895
