The Colony of Natal : an account of the characteristics and capabilities of this british dependency . Umhlanga, a distance ofonly ten miles. 60 THE COLONY OF NATAL The daily oscillation of the atmospheric pressure is verydistinctly marked in Natal. Tlie mercury in the neighbourhoodof Maritzburg, as a rule, falls about the tenth part of an inchtowards the afternoon, and then again rises in the mercurial column stands about a fifth of an inch higher inthe coldest month than it does in the hottest. The mean heightof the mercurial column for the month of July, 1858, at a stationnear Ma
The Colony of Natal : an account of the characteristics and capabilities of this british dependency . Umhlanga, a distance ofonly ten miles. 60 THE COLONY OF NATAL The daily oscillation of the atmospheric pressure is verydistinctly marked in Natal. Tlie mercury in the neighbourhoodof Maritzburg, as a rule, falls about the tenth part of an inchtowards the afternoon, and then again rises in the mercurial column stands about a fifth of an inch higher inthe coldest month than it does in the hottest. The mean heightof the mercurial column for the month of July, 1858, at a stationnear Maritzburg, and 2055 feet above the level of the sea, ,700 inches. The mean height for the month of January, 1859^7 was 27,884 inches. The highest reading for the winter months was 28,304 inches. The highest reading for the summer months28,143 inches. As a rule, the atmospheric pressure continuesmuch more steady in winter than in summer. This, as well asthe greater height of the mercury of the barometer in winter, isvery plainly shewn in the accompanying diagram— Mav-TSBSJ 5 ?J ,77 June,. 13 17 10 JSovemher -1(158 DcccmJ^cr DiAGUAM 5. Comparison of Barometric Waye for Winter Month and SummerMontli, at ]\Iaritzburg, 1858. In which the oscillations of the barometric column in the monthsof May and November, 1858, are traced down as continuouslines. The lighter shade rejDresents the wave of barometricpressure, from the 15th day of the month of May, 1858. Thedarker shade represents the wave from the 15th day of November,1858. There is, no doubt, an intimate relation existing betweenthe incessant variations of atmospheric pressure, and thefrequency of thunder-storms, during the season of its almost tropical position on the earth, CLIMATE. 61 and its frequent vicissitudes of temperature, Natal is remarkablyfree from the more grave forms of disease. In this respect theseveral colonies of South Africa are all eminently returns have shewn
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Keywords: ., bookcentury1800, bookdecade, booksubjectagriculture, bookyear1859
