1 30 Mr. J. Glaisher's Remarks on the Weather 



The mean weight of water in a cubic foot of air for the 

 quarter was 36 grains. The average from the preceding 

 nine years was 3*8 grains. 



The mean degree of humidity in April was 0*795, in May 

 was 0*765, and in June was 0*702. The averages from the 

 nine preceding years were 0*808, 0*788 and 0*702 respectively. 



The mean reading of the barometer at Greenwich in April 

 was 29*594- inches, in May was 29*714, and in June was 29*886. 

 These readings are 0*114 less, 0*071 less, and 0*089 greater 

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

 ceding nine years. 



The average weight of a cubic foot of air for the quarter, 

 under the average temperature, humidity and pressure, was 

 532 grains; being of the same value as that of the average of 

 the preceding nine years. 



The rain fallen at Greenwich in April was 2*4 inches, in 

 May was 2*3, and in June was 1*0. The falls for these three 

 months on an average of thirty-four years, are 1*7, 2*0 and 1*7 

 inches respectively. 



The average daily ranges of the readings of the thermometer 

 in air at the height of four feet above the soil, in April was 

 16°*0, in May was 1S°*9, and in June was 26°*0. The ave- 

 rages for these three months from the preceding nine years 

 were 17°*4, 18°* 9 and 19°*4 respectively. 



The minimum readi?igs of the thermometer on grass in April 

 was at or below 32° on twelve nights; the lowest was 23°; 

 was between 32° and 40° on fourteen nights, and exceeded 

 40° on four nights ; the highest reading was 44°. In May 

 the readings were at and below 32° on thirteen nights ; the 

 lowest was 15°; they were between 32° and 40° on eleven 

 nights ; and on seven nights the readings exceeded 40°. In 

 June the readings were at or below 32° on two nights; the 

 lowest was 29°; they were between 32° and 40° on six nights, 

 and they exceeded 40° on twenty-two nights. At Cardington, 

 as observed by S. C. Whitbread, Esq., the reading of the 

 thermometer on grass in April was twelve nights, in May 

 was twelve nights, and in June was three nights below 32°. 



The temperature of the water of the Thames? from the ob- 

 servations of Lieut. Sanders, R.N., Superintendent of the 

 Dreadnought Hospital Ship, was 48°*4 in April, 54°*3 in May, 

 and 63°*7 in June. 



Fog was prevalent on April 6 at Dundee and Whitby ; on 

 the 12th at Rugby and Whitby; on the 13th at Folkestone 

 and Whitby; on the 16th at Whitby and Dundee; and on 

 the 20th at Edinburgh, Berwick and Whitby. On May 8 at 

 Stone and Whitby; on the 11th at Greenwich; on the Z5th, 



