Abstract
III THE MILLER-CASELLA THERMOMETER A T 8 A.M., on March 26, we sounded, lat. 19° 41' N. . long. 6° 7' W., in 3,875 fathoms. The sounding was perfectly satisfactory, and left no doubt that the depth was estimated within a very small error. The "Hydra" sounding itsstrument was used weighted to 3 cwt. A slip water-bottle, and two Miller-Casella thermometers (Nos. 39 and 42) were sent down along with it as usual. The tube of the "Hydra" came up filled with a reddish clay containing a considerable quantity of carbonate of lime. The two thermometers were broken, and as the mode in which the fracture occurred is in itself curious, and has an important bearing upon the use of these instruments at extreme depths, I will briefly describe the condition of the thermometers when they came to the surface.
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THOMSON, W. Notes from the “Challenger” . Nature 8, 109–110 (1873). https://doi.org/10.1038/008109a0
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DOI: https://doi.org/10.1038/008109a0