Meteorological Observations for September 1831. 397 



LUNAR OCCULTATIONS FOR NOVEMBER. 



Occultations of Planets and Jixed Stars by the Moon, in November 

 1831. Computed for Greenwich, bjj Thomas Henderson, £5^. ^ 

 and circulated by the Astronomical Society. 



METEOROLOGICAL OBSERVATIONS FOR SEPTEMBER 1831. 

 Gosport: — Numerical Results for the Month. 



Barom. Max. 30-302. Sept.l 6. Wind N.E.—Min. 29-295. Sept.30. WindS.E. 

 Range of the mercury 1-007. 



Mean barometrical pressure for the month 29-962 



Spaces described by the rising and falling of the mercury 3-608 



Greatest variation in 24 hours 0-316. — Number of changes 13. 

 Therm. Max. 71°. Sept. 5. Wind S.W.— Min. 45°. Sept. 2. Wind N.W. 

 Range 26°.— Mean temp, of exter. air 59°-16. For 31 days with © in nj6005 

 Max. var. in 24 hours 19°-00.— Mean temp, of spring-water at 8 A.M. 54-01 

 De Luc's Whalebone Hygrometer. 



Greatest humidity of the atmosphere, in the evening of the 27th 96° 



Greatest dryness of the atmosphere, in the afternoon of the 3rd 48-0 



Range of the index 43.9 



Mean at 2 P.M. 62°-6.— Mean at 8 A.M. 70°3.— Mean at 8 P.M. 77-8 



of three observations each day at 8, 2, and 8 o'clock 70-2 



Evaporation for the month 2-40 inches. 



Rain in the pluviameter near the ground 3-711 inches. 



Prevailing wind, South-west. 



Summary of the Weather. 

 A clear sky, 3; fine, with various modifications of clouds, 16^; an over- 

 cast sky without rain, i>}. ; rain, 5. — Total 30 days. 

 Clotids. 

 Cirrus. Cirrocumulub. Cirrostratus. Stratus. Cumulus. Cumulostr. Nimbus. 

 15 7 27 24 23 17 



Scale 



