142 ]\Ir. J. Glaisher on the Meteorology of England 



41°-2, 43°-0, and 38°-3 respectively. These values are 4°-8 less, 

 0°-7 and P-3 greater than the averages of the same months in 

 the preceding nine years. 



The mean elastic force of vapour at Greenwich for the quarter 

 was 0*269 inch, being 0'013 less than the average from the pre- 

 ceding nine years. 



Tlie mean weight of water in a cubic foot of air for the quarter 

 was 3*1 grains, being 0'2 gi-ain less than the average from the 

 preceding nine years. 



The mean degree of humidity in October was 0'82, in November 

 was 0-86, and in December was 0*92. The averages from the 

 nine preceding years were 0-88, 0-99, and 0-90 respectively. 



The mean reading of the barometer at Gi-eenwich in October 

 was 29-681 inches, in November was 29*728, and in December 

 was 29-914. These readings are 0-014, 0-035, and 0-087 greater 

 respectively than the averages of the same months in the prece- 

 ding nine years. 



TJie average weight of water in a cubic foot of air in the quarter 

 was 543 grains, exceeding that of the average from the preceding 

 nine years by 1 grain. 



The rain fallen at Greenwich in October was 1-4 inch, in No- 

 vember was 2-5 inches, and in December was 4-3 inches. The 

 falls for these three months on an average of nine years, are 3-4 

 inches, 2-6 and 1-6 respectively. 



The average daily ranges of the 7'eadings of the thermometer in 

 air at the height of four feet above the soil, in October was 14°-2, 

 in November was ll°-4, and in December was 8°'7. The ave- 

 rages from the preceding nine years are 13°-9, 10°'4, and 9° 

 respectively. 



The minimum readings of the thermometer' on grass, with its bulb 

 fully exposed to the sky, in October was at or below 32° on six- 

 teen nights; the lowest was 18°; between 32° and 40° on thir- 

 teen nights, and above 40° on two nights ; and the highest was 

 41°. In November was at or below 32° on twelve nights; the 

 lowest was 14° ; between 32° and 40° on twelve nights, and 

 above 40° on six nights ; the highest was 46°. In December 

 it was at or beloM^ 32° on nineteen nights ; the lowest was 9° ; 

 between 32° and 40° on ten nights, and above 40° on two nights ; 

 and the highest was 43°-5. 



Thunder-storms occurred on October 1 at Uckfield and Not- 

 tingham ; on the 5th at Hartwell Rectory, Hartwell House, 

 Stone, Thame and Liverpool ; on the 8th at Cardington ; on the 

 9th at Nottingham, Cardington, Manchester and Stonyhurst ; 

 on the 11th at Hartwell Hovise; and on the 23rd at Jersey. 

 On November 4 at Wakefield, and on the 19th at Jersey. On 

 December 14 at Jersey, Guernsey, Helston, Falmouth, Truro 



