Abstract
THE WEATHER MAP for OCTOBER 1878, which appeared in our issue of August 19, showed an area of barometric depression overspreading the whole of the United States except a narrow patch extending from Great Salt Lake northwards. The depression was deepest in the region of Minnesota, where it was 0.150 inch under the average, stretching thence in a west-southwest direction toward San Diego, where it was 0.077 inch below the mean. On the Atlantic sea-board of the States, pressure was 0.014 inch in the south and 0.033 inch in the north below the average, and continued relatively low right across the Atlantic, the depression deepening to another minimum over the region including the north-west of Ireland and Scotland, where the greatest defect from the average reached 0.220 inch. This widespread depression stretched still further to eastward over the whole of Europe, except the extreme north of Scandinavia, the southern half of Italy, and all Russia, except its north-western provinces; and to southward at least as far as the equator. Another extensive region of low pressure covered the whole of Asia to the south of a line drawn from Shanghai round by Lake Balkash to the Persian Gulf, and extended south-eastward over the whole of the East India Islands and Australasia as far as the east coast of New Zealand, where atmospheric pressure rose to the average of the month. Pressure was also much under the average in Cape Colony and Mauritius.
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The United States Weather Maps for October and November 1878 . Nature 22, 516–517 (1880). https://doi.org/10.1038/022516a0
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DOI: https://doi.org/10.1038/022516a0