Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta, in the month of December, 1863. Hourly Means, &c. of the Observations and of the Hygrometrical elements dependent thereon. The Mean Height of the Barometer, as likewise the Dry and Wet Bulb Thermometer Means are derived from the Observations made at the several hours during the month. Hour. Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta, in the month of December, 1863. Hourly Means, &c. of the Observations and of the Hygrometrical elements dependent thereon.—(Continued.) Mid All the Hygrometrical elements are computed by the Greenwich Constants. From the 1st January, 1863, the Greenwich New Factors have been used for computing Dew-points. Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta, Cirri, i Cirro strati, i Cumuli, i Cumulo strati, i Nimbi,-i Strati hi Cirro cumuli. Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta, Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta, Max. height of the Barometer occurred at 10 A. M. on the 19th, Mean daily range of the Barometer during the month, Mean Dry Bulb Thermometer for the month, Mean daily range of the Temperature during the month, Mean Wet Bulb Thermometer for the month, .. .. Mean Dry Bulb Thermometer above computed Mean Dew-point, 5.05 2.18 0.70 Mean Weight of Vapour for the month, Additional Weight of Vapour required for complete saturation, Mean degree of humidity for the month, complete saturation being unity, |