. Carnegie Institution of Washington publication. NUCLEATION AT PROVIDENCE AND BLOCK ISLAND. 121 two cases must be marred by the snow effect, which is necessarily of unequal value in the two cases, the depression being as a rule larger and more striking as the antecedent nucleation is higher. On Decem- ber 12 the two curves behave similarly, but not so December 3, 8, 13, 18, 21. The remarkable depression of the upper curve on December. 16 17 18 ~ 19 20 21 22, 23 24 FIG. 96.—Showing daily record for November 29 to December 27. 24 is noteworthy. Some instances of detailed similarity (December 4,
. Carnegie Institution of Washington publication. NUCLEATION AT PROVIDENCE AND BLOCK ISLAND. 121 two cases must be marred by the snow effect, which is necessarily of unequal value in the two cases, the depression being as a rule larger and more striking as the antecedent nucleation is higher. On Decem- ber 12 the two curves behave similarly, but not so December 3, 8, 13, 18, 21. The remarkable depression of the upper curve on December. 16 17 18 ~ 19 20 21 22, 23 24 FIG. 96.—Showing daily record for November 29 to December 27. 24 is noteworthy. Some instances of detailed similarity (December 4, 9, 20, etc.) might be pointed out, but in general the curves in their details are dissimilar. Differences in winds and temperatures, here as elsewhere, are in the main influenced by the times at which observations were severally made. The two sets of results show, as a whole (beginning with November 27), the state of high contamination of the atmosphere of Providence as compared with that of Block Island. Rarely do the. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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