Durand, Loyal, Jr. (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XXXI (1938)
James, Harry Raymond; Birge, Edward A.
A laboratory study of the absorption of light by lake waters, pp. -154 PDF (46.6 MB)
70 C 4000 5000 6000 7000 8000 26 Wisconsin Academy of Sciences, Arts, and Letters FIG. 3. Curves showing the percentage of radiation absorbed by one meter of distilled water, as determined by various observers. Only 4 curves are plotted, in order to avoid confusion. For details and for other curves see Figs. 4, 5, 6. The main curve (J) shows absorption as found by the present report; it is lower than other recent work in the region 8000-7500 A, higher at 7000-6000 A, and lower again at 5000-4000 A. These results agree with those of Aschkinass (As), 7000-8000 A, so closely that much of the latter curve cannot be plotted; the curves diverge widely, 6500-7000 A. Sawyer's curve (5) begins at 6500 A, where it has absorption lower than any other observer; in the violet Sawyer's results are higher than others. For high absorption in the long wave region the curve of Collins is plotted, since it shows the greatest absorption to 7000 A.
This material may be protected by copyright law (e.g., Title 17, US Code).| For information on re-use, see http://digital.library.wisc.edu/1711.dl/Copyright