kepi at Bancoorah durhig the year 9 1827-28. S39 



ment. But it is only whilst the hot winds continue that the two 

 thermometers materially differ; at all other seasons of the year 

 the temperature in both situations is remarkably equal. Theie 

 was no artificial means resorted to, as tattees^ for cooling the 

 room in which my thermometer hung, so that the temperature 

 is given as it really happened, without any influence upon it 

 beyond the necessary openness of the dwelling. Tattees are 

 very generally had recourse to for procuring comfort in the hot- 

 weather. They are constructed of an oblong wooden frame of 

 split bamboo^ having the body of it thickly wattled with the small 

 sprigs of the bamboo, and the interstices filled with the coarse 

 grass common to the country. When wanted, this frame is 

 placed against the door- way upon which the hot wind is blow- 

 ing, with the folded-door shut, and the Venetian-blinds open, and 

 being constantly kept wet with water, the wind passes through 

 it cool into the room within. Whether tattees conduce to the 

 Jiealth of those under their influence is a question left for medi- 

 cal men to determine. 



The atmospherical pressure yfdiS noted from an excellent marine 

 barometer in an adjoining room ; and the quantity of rain was care- 

 fully measured by a rain-gauge placed in the centre of a grass- 

 plot fronting the house, and away from all overhanging impedi- 

 ments. 1 did not observe the hygrometer. In the rainy season 

 the atmosphere is perfectly moist, and in the hot weather it is dry 

 to a very great degree, no dew falling during the night at this 

 season. From what I observed, I was led to conclude that the 

 driest month is April, and July that in which there is the most 

 moisture. In the cold weather, the atmosphere is less dry than 

 the clearness of the sky would indicate, from the heavy dew 

 that falls during the night being evaporated by the succeeding 

 day's sun, and remaining in a state of vapour, to condense again 

 after his setting. The greatest range of the thernx)meter in the 

 room was from 60° to 98°, and the greatest differe^ice during t! e 

 day never exceeded 9', and that only following a severe storm, 

 after a preceding temperature of 90° and upwards. I never saw 

 the barometer lower than 29*250, nor higher than 30-200 ; and 

 a variation of 2 hnes iKtwcen the two observations, was always 

 looked upon as remarkable, and never happened but in very 

 wet weather. The temperature of the external air in the eokt 



y2 



