. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: E^IPLORATIONS IN THE GULF OF MAINE. 41 and this maj' be considered the extreme. There is one other source of error in any reversing thermometer actuated by a propeller; i. e., uncertainty at what precise level the instrument reverses, with possi- bility of change in reading during its passage upward through the column of water necessary to reverse it. But we so often used two thermonieters at each level, and so often repeated the entire series, that I do not believe this possible error is of any practical imp
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: E^IPLORATIONS IN THE GULF OF MAINE. 41 and this maj' be considered the extreme. There is one other source of error in any reversing thermometer actuated by a propeller; i. e., uncertainty at what precise level the instrument reverses, with possi- bility of change in reading during its passage upward through the column of water necessary to reverse it. But we so often used two thermonieters at each level, and so often repeated the entire series, that I do not believe this possible error is of any practical importance in the present case. On the whole, then, it is better not to claim accu- racy closer than ±.3°F; , roughly, .15°C. And it is certainly much better to set these limits wide, rather than to claim a higher degree of accuracy than can be relied upon. The surface thermometers were extremely reliable, and so far as the instruments themselves are concerned very little error is to be expected. But the readings were taken by various persons, often under difficult conditions, therefore accuracy is not claimed beyond ± .5°F. C>pc Eluahtthj. Fig. 3.— Bathymetic chart of the Gulf of 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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