Meteorological Essays and Observations
By the early nineteenth century, meteorologists were equipped with plenty of useful devices: barometers, thermometers, hygrometers, and any number of variations thereon. But the nature of these instruments was not wholly understood. While it was possible to take accurate measurements with a barometer, what physical process made the mercury move? What exactly is atmospheric pressure? And how can one measure sunlight? Ranging from wild theories of gravity-resistant air particles to the latest experiments in altitude, chemist and physicist John Frederic Daniell (1790-1845) presents his answers in this collection of essays. First published in 1823, this enlarged second edition of 1827 includes his work on the climate of London, the effect of atmospheric conditions on human health, and suggested improvements for the design of a new hygrometer. Daniell later became the first professor of chemistry at King's College, London, and foreign secretary of the Royal Society.
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_ rain 12 very ﬁne amount aqueous vapour atmo atmosphere barometer brisk calculated Capillary Action cause climate climate of London clouds cold column condensation conﬁned conﬁrmed cubic foot decrease degree of dryness degree of moisture density dew-point direction ditto 28 Ditto ditto dull 29 dull 30 earth effect elasticity equal equator Essay evaporation expansion experiments feet ﬁnd ﬁrst ﬁve ﬂow ﬂuid Force of vapour glass heat height hygrometer inches REMARKS increase inﬂuence instrument latitude latter Least observed degree longitude mean temperature mercury meteorological Minimum modiﬁcations month motion night overcast 29 perature point of deposition poles precipitation pressure quantity radiation rain 29 reﬂector rise S W ditto saturation season showers 29 speciﬁc gravity sphere station sun’s suppose surface take place Temp temperature thermometer tion trade winds tropical tube ture upper velocity weather