. Annals of the New York Academy of Sciences. Science. ARCrOWSKI, VOLCANIC DUST VEILS 167 as a standard. Moreover, in my previous publications I have shown that the consecutive means observed at Arequipa express very well the normal pleionian variation and may serve as a standard in all cases of comparison. In the accompanying diagram (Fig. 6) the consecutive temperature curves along the Pacific coast are represented, together with the ^Mauritius and Arequipa curves. The latitudes of Fort Liscum, Sitka, Loring and Victoria are: 61° 2', 56° 50', 55° 32' and 48° 26' K The occurrence of the erupt
. Annals of the New York Academy of Sciences. Science. ARCrOWSKI, VOLCANIC DUST VEILS 167 as a standard. Moreover, in my previous publications I have shown that the consecutive means observed at Arequipa express very well the normal pleionian variation and may serve as a standard in all cases of comparison. In the accompanying diagram (Fig. 6) the consecutive temperature curves along the Pacific coast are represented, together with the ^Mauritius and Arequipa curves. The latitudes of Fort Liscum, Sitka, Loring and Victoria are: 61° 2', 56° 50', 55° 32' and 48° 26' K The occurrence of the eruption coincided with the pleionian crest of Arequipa. For Arequipa the con- secutive mean of July, 1911, to June, 1912, is the highest. From then on the temperature decreases until the consecutive mean of Octo- ber, 1912,-September, 1913. The same is true at Mauritius; but there the pleionian crest is very different from what it is at Arequipa—it is flat. Since the same may be ob- served ^on the curve of Victoria, the apparent depression of the crest of this station cannot be ascribed with- out hesitation to the effect of the Katmai haze. The other curves—the Fort Lis- cum curve in particular—resemble the Arequipa curve so very much that we may admit that at least the depression of the values from the mean of August, 1911,-July, 1912, to the mean of December, 1911,-No- vember, 1912, is due to the effect of volcanic dust. The dotted lines indicate the portions of the pleionian crests which may have been de- pressed. The cun'es of the stations at Xome, Tanana and Fairbanks, situated north of the Alaskan range, do not seem to have been affected, and that of Eagle but slightly. Tn the case of Edmonton, it is difficult to Fig. 6. -Arequipa pleion of 1911-1912 otserved in Alasl'a. 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 perfect
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1877
