Meteorological Journal for September. 319 



Nwnerical Results for the Month. 

 Inches. 

 -r, /Maximum 80*24, Sept. 15th— Wind N.E. 



Karometer \ Minimum 29-20, Ditto 7th— Wind N.W. 

 Range of the mercury . . 1*04. Inches 



Mean barometrical pressure for the month 29*890 



■ for the lunar period ending the 2nd inst. . 29*966 



for 15 days, with the Moon in North declin. 29*847 



for 14 days, with the Moon in South declin. 30*085 



Spaces described by the rising and falling of the mercury 5*440 



Greatest variation in 24 hours 0*670 



Number of changes , 18* 



rp, . K Maximum 74°, Sept. 4th— Wind S.W. 



jt neimometei \ ~\t* * ^ • i • i , 



I Minimum 48 in several nights. 



Range 26 



Mean temp, of the external air 61 *33 



for 3 1 days with the 1 M1 . 



o • -rT. J > 62*10 



bun in Virgo J 



Greatest variation in 24 hours 20*00 



Mean temp, of spring water 1 KSnQ 



at 8 o'clock A.M. . . . / 55 ' Uy 



De Luc's Whalebone Hygrometer. 

 Degrees. 

 Greatest humidity of the air . 100 in the evening of the 8th. 

 Greatest dryness of ditto ... 43 in the aftern. of the 11th. 



Range of the index 57 



Mean at 2 o'clock P.M. . . . 58*6 



at 8 o'clock A.M. . . . 70*0 



at 8 o'clock P.M. . . . 73*9 



— of three observations each 1 p*.* 



day at 8, 2, and 8 o'clock / 



Evaporation for the month . 2*70 inch. 



Rain in the pluviameter near the ground . 4*555 



Rain in ditto 23 feet high 4*220 



Prevailing wind, S.W. 



Summary of the Weather. 

 A clear sky, 5 ; fine, with various modifications of clouds, 

 12|; an overcast sky without rain, 6\\ foggy, ■§•; rain, 5\. — 

 Total 30 days. 



Clouds. 



Cirrus. Cirrocumulus. Cirrostratus. Stratus. Cumulus. Cumulostr. Nimbus. 



20 10 26 24 18 17 



Scale of the prevailing Winds. 



JSl. N.E. E. S.E. S. S.W. W. N.W. Days. 

 2 5 3 4 3 6i 2h 4 30 



A METEORO- 



