240 Mr, Howard's Meteorological Journal, [Sept. 1825, 



REMARKS. 



SeventJk MontJu—\. Showers. 2 — 5. Fine. 6. Cloudy, with showers, 7. Cloudy. 

 8—51. Fine, clear, and dry. 



RESULTS. 



Winds: N,5; NE, 4; E, 8; SE,3; S, 1 ; SW, 1 ; W, 3; N\V, 6. 

 Barometer : Mean height 



For the month 30*229 inches. 



Thermometer: Mean height 



For the month 66-S87* 



Evaporation 5*80 in. 



Rain 009 



*,* The very unusual height of the thennometer on several days of this month hav- 

 ing led me to examine the position of the instrument, I was induced to think that it 

 indfcated a higher temperature than that of the air, in consequence of radiation from 

 the dry and heated earth in the neighbourhood. To ascertain the extreme amount of 

 this error, I suspended a thermometer in a spot thickly shaded with trees, and overhang- 

 ing a river, so as to exclude the influence of radiation, and found it indicate 4° to 5° 

 lower on the days of the greatest heat — probably the real temperature of the air was 

 between these points. 



Lahoratoryy Stratford^ Eighth Month^ 23, 1825. R. HO>VARD. 



