54 APPENDICES. 



TABLE 2. The observations for 1859, taken by themselves, give 

 the following r 



METEOROLOGY OF DHURMSALLA FOR 1859. 



Mean pressure, corrected ... ... ... 24-052 inches. 



Mean temperature of the air ... ... ... 60-2 degrees. 



Mean temperature of the wet bulb ... ... 47*4 



Mean daily range of temperature ... ... 15 '4 



Highest temperature in the year, on June 2nd ... 90- 



Lowest temperature in the year, on December 3rd ... 30'3 



Eange of temperature in the year... ... ... 597 



Mean degree of humidity of air (saturation = 100) ... 61 '3 



Amount of rain in the year ... ... ... 137-91 inches. 



Number of days rain fell... ... ... ... 162- 



REMARKS. In 1859, snow fell in the station in January, February, March 

 and December. The heaviest fall (December 3) averaging 14^ inches. February 

 was 2 1' colder than January. The spring and summer months were very 

 unsettled, and thunder storms and hurricanes were of frequent occurrence. I 

 consider the maximum temperature of the year (90 F.) somewhat below the 

 average. On April 11, the black bulk thermometer in the sun's rays rose to 

 157 2'. The power of solar radiation is known to increase with a rise above the 

 sea level; and in August, on the Peak of Teneriffe, at an elevation of nearly 

 10,000 feet, Professor P. Smyth recorded an observation of the radiation ther- 

 mometer at 212, the temperature in the shade being 60. A temperature of 

 157 in April would have given one of at least 180 in June, I believe, had not 

 my instrument been broken in a storm. The rain-fall in 1859 was spread more 

 equally over the whole year than is usual. In August, 1858, 79-375 inches of 

 rain fell; in August, 1859,39-555 inches, or about half. Of the eighteen months' 

 observations in Table 1, the first nine months were taken at an elevation of 

 5,800 feet, and the second time of 6,100 feet, in a different part of the station. 

 Their results may therefore be taken to represent the meteorology of the station 

 generally with more accuracy than if they had been taken at one place. 



(Signed) J. J. T. LAWRENCE, 



Civil Assistant- Surgeon of Dhurmsalla, 



Dhurmsalla, April 1, 1860. Sfc. fyc. fyc. 



