. Conditions of life in the sea; a short account of quantitative marine biological research. Marine biology. n. Fig. 3. A. The Negretti and Zambra deep-sea reversing thermometer. The messenger is lowered down the line, strikes the catch C which then lifts the rod jR from a depression in the thermometer case. The latter then turns over or reverses, breaking the mercury thread in the thermometer. B. The most recent deep-sea reversing thermometer (Richter's pattern). C. A Kiel hydrometer. Please note that these images are extracted from scanned page images that may have been digitally enhanced fo
. Conditions of life in the sea; a short account of quantitative marine biological research. Marine biology. n. Fig. 3. A. The Negretti and Zambra deep-sea reversing thermometer. The messenger is lowered down the line, strikes the catch C which then lifts the rod jR from a depression in the thermometer case. The latter then turns over or reverses, breaking the mercury thread in the thermometer. B. The most recent deep-sea reversing thermometer (Richter's pattern). C. A Kiel hydrometer. 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 Johnstone, James, 1870-1932. Cambridge, University press
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