Papers on meteorology : relating especially to the climate of Britain, and to the variations of the barometer / by Luke Howard.

  • Howard, Luke, 1772-1864.
Date:
1850-1854
Catalogue details

Licence: Public Domain Mark

Credit: Papers on meteorology : relating especially to the climate of Britain, and to the variations of the barometer / by Luke Howard. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    123/174
    of the barometrical mean. The last quarter, which had the highest barometer with a temperature a little above the mean, shows the least depth of rain. The new moon, with a considerably depressed temperature and lower barometer, brings an increase of rain. The effect of the first quarter is still to lower the barometer, but to raise the temperature almost to the point it had fallen from, the rain increasing still, but not in an equal ratio. Lastly, the full moon brings down the temperature again, and, with the barometrical average at its minimum, we have now the maximum of rain. And it appears that, during this lunar cycle, the approach of the last quarter was the signal for the clearing up of the air and the return of sunshine. TABLES OF THE VARIATION, THROUGH A CYCLE OF NINE YEARS, OF THE MEAN HEIGHT OF THE BAROMETER, MEAN TEMPERATURE AND DEPTH OF RAIN, AS CONNECTED WITH THE PREVAILING WINDS, INFLUENCED IN THEIR DIRECTION BY THE OCCURRENCE OF THE LUNAR APSIDES; WITH SOME CONCLUDING OBSERVATIONS ON THE RESULT*. Table I.—1815. Under Apogee. Under Perigee. Wind. Mean barometer. Mean temp. Rain. Wind. Mean barometer. Mean temp. Rain. inches. degr. in. inches. degr. in. Dec. 27 [14]. S.E. 29-195 38-0 1-25 January 11.. N.W. 29700 36-0 0-28 January 24 . . Var. 29-575 24-5 0-57 February 7-. Var. 29-625 44-0 0-55 February 22 . N.W. 30-175 48-0 0-05 March 6 .. .. w. 30 035 47-5 1-05 March 22 ... s.w. 29-425 53-0 0-67 April 3 Var. 29-860 47-5 0-53 April 19 Var. 30-015 48-5 1-18 May 1 E. 29-660 58-5 0-27 May 13 .... s.w. 29-600 55-0 0-38 May 29 .... Var. 29-825 59‘5 0-61 June 10 .... N.W. 29-760 58-5 1-21 June 25 .... N.E. 29-935 53-5 Fair. J uly 8 N.W. 29-980 56-5 002 July 23 .... N.W. 30 010 60-5 0-27 August 5.... W. 29-755 60-0 0-25 August 19 .. w. 29-675 560 102 September 2 . S.W. 29-910 65-0 0-06 September 15 S.E. 29-710 65-5 0-20 October 1 .. s.w. 29-605 50-5 0-63 October 13 . . Var. 29-690 56-5 0-39 October 29 .. N.E. 29-920 51-5 Fair November 9 . s.w. 29-920 490 113 November 24 N.W. 29-370 34-5 0-18 December 7 . N.E. 29-865 300 Fair December 20 S.W. 29-135 41-0 0-31 Mean 29-8085 51-077 6-30 Mean 29-7443 48-893 6-76