. The climate and weather of Baltimore . • . Ten-Year Means. ;].,,s , ,;, | ^,,,
. The climate and weather of Baltimore . • . Ten-Year Means. ;].,,s , ,;, | ^,,, , Table XIX shows the mean monthly, seasonal and annual temperature forBaltimore for 88 years from 1817 to 1904. The table contains three distinctrecords: (a) observations from 1817 to 1824, by Capt. Lewis Brantz, in whatwas then west Baltimore; (b) observations at Fort McHenry, along theBaltimore harbor, from 1831 to 1870; (c) observations under the auspices ofthe United States Weather Bureau from 1871 to DEPARTURES URES IIK MF\X MONTUIV SlUnv ^ °° . , MiA>,( AM, AXM AL THMPERATURE FRcM NORMAL FOR 8/ YEARS. MARYLAND WEATHER SERVICE 95 The Lewis Brantz observations were reduced to the Fort McHenry seriesby applying corrections derived from an overlapping period in 1836 and1837. The monthly means for the period from 1825 to 1830 were derived fromWashington, D. C, observations, and reduced to the Fort McHenry series byadding the departures from the Washington, D. C, normal temperatures tothe Fort McHenry normal. The means for the years 1859 to 1863 were re-duced to the Fort McHenry series in a similar manner by means of a 20-yearrecord of overlapping observations made at Shellmans Hills, about 20 mileswest of Baltimore. The record from 1817 to 1870 was then made conformableto the Weather Bureau record from 1871-1903 by means of departures derivedfrom overlapping records covering a period of about 20 years. Thus theentire record from 1817 to 1
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