Meteorological Observations in Upper Assam. 447 



On the 1 7th at 9 p. m. very heavy rain and thunder, which continued 

 the whole night, during w^hich 3.2 inches of rain fell. 

 Mean height of Bar. 29.4258 inch. Ther. 64.57°. 



At Sunrise. 2 p. m. Sunset. 



Bar. 29.4374 inch 29.4310 29.4090 inch. 



Ther. 56.58=^ 69.15° 68.00°. 



Greatest pressure observed 29.57 inch, least ditto 29.32 inch. 

 Highest temperature observed 76°, lowest ditto 48°. 

 Greatest variation, Bar. 0.25 inch. Ther. 28°. 



March. — This month was ushered in with heavy rain. Weather 

 throughout unsettled, sky alternately clear and overcast, with periodic 

 returns of heavy rain and thunder at night ; to this few exceptions. 

 Rain during the month 10.3 inches. 

 Mean height of Bar. 29.3628 inch. Ther. 66.57°. 



At Sunrise. 2 p. m. Sunset. 



Bar. 29.3670 inch 29.3683 inch 29.3532 inch. 

 Ther. 59.93° 69.90° 69.90° 



Greatest pressure observed 29.50 inch, least ditto 29.20 inch. 

 Highest temperature observed 77°, lowest ditto 55°. 

 Greatest variation, Bar. 0.30 inch. Ther. 22°. 



April. — A very rainy stormy month, with the usual periodic thunder 

 showers at night ; these often occur for 10 or 12 nights successively, 

 commencing later and later till they fall in the morning. 

 Rain during the month 17 inches. 

 Mean, height of Bar. 29.2791 inch. Ther. 71.20°. 



At Sunrise. 2 p. m. Sunset. 



Bar. 29.2836 inch 29.2803 inch 29.2736 inch. 

 Ther. 67.70° 72.86° 72.86° 



Greatest pressure observed 29.39 inch, least ditto 29.12 inch. 

 Highest temperature observed 84°, lowest ditto 64°. 

 . Greatest variation Bar. 0.27 inch. Ther. 20°. 



May. — Cloudy, showery, or overcast, with frequent intervals of fair 

 weather. Little rain in the forepart of the day ; the heavy periodic 

 showers fall in the afternoon, and most frequently about 4 pm. 

 Rain during the month 8.65 inches. 

 Mean height of Bar. 29.2031 inch. Ther. 80.03°. 



At Sunrise. 2 p. m. Sunset. 



Bar. 29.2135 inch 29,2048 inch 29.1910 inch. 

 Ther. 75.21° 83.19° 81.69° 



Greatest pressure observed 29.35 inch, least ditto 29.10 inch. 

 Highest temperature observed 90°, lowest ditto 70°. 



